I am sorry I am too dumb to follow you...
Just for the sake of the discussion, I'll do your own work for you (hoping it will at least useful for others, I don't expect anything from you).
Publishing your real informations online means that random people can get them. With the wealth of information that Internet has become, it also means that you can very easily, very quickly, get a LOT more personnal informations once you've grabbed a few critical ones (depending on the rarity of first/last name combination, it may be still rather hard to pinpoint the person and require a bit more informations, or it can be instantaneous). Basically, they can usually get your adress, phone number and Facebook pages.
To sum up, it means anyone can reach you, your home and your acquaintances.
Now think about what someone who has a grudge on you and can be rather certain of his impunity can do with this. I'm pretty sure it doesn't require a lot of imagination to get to some pretty creepy scenarios.
But well, for those who are too lazy to do such mental exercices, I'll just dig a few actual, real-life example that actually happened and have nothing to do with being "paranoid" or things like that. I took a few from each of three categories : a pretty minor (but illustrating the point), two rather serious and making life hard (which is far more than a reason enough to say it should not happen), and two downright criminal.
- The minor one : Blizzard attempted to do the same with their Battle.net accounts. There was a big uproar, of course. Among the discussion, I stumbled upon one interesting exchange. Guy A claimed that it wasn't a big deal and nothing would come from simply a name. Guy B asked "want me to prove it ?". Guy A posted his name and said "go for it". Then Guy B, after a bit of research, found who Guy A was and called him at his desk at work, and told him "See, found you".
Nothing more happened, but it opened the eyes of Guy A and he rescinded his support for the change.
- The first quite serious one : Still in the Blizzard and World of Warcraft world, I saw this on one of the forum of one of the biggest guild of the game, while looking for things completely unrelated.
Basically, one girl had a relationship with one guy from the guild, then a fall out (I don't remember what were the details, and they are pretty irrelevant ; the only thing is that the guy had her name, some pictures of her naked, and a grudge). So well, he wanted to take revenge, posted naked pictures of her in the thread, her number and her address.
Jerks found it fun to join in the bashing, and so it ended with the girl being :
- Constantly texted dirty message.
- Having pizza and the like delivered at her house in her name (which she didn't asked for of course).
- Her social page plastered with the pictures.
- Called at her landline all throughout the night until she cut off the phone.
The thread was closed a few hours later. I don't know how long the harassment happened, but even if it stopped right there, I still consider this rather traumatic.
- The second quite serious one : a rather well-known one too. A guy made a very disparaging and sexist comment about a woman. He was a dick, nobody deny it. The woman dealt a bit of poetic justice by publishing his name and his comment for everyone to see on the Net. Of course the guy was ridiculed, mocked and looked down upon.
But the thing is, as it became very well know, he ended up with a reputation completely destroyed, and people refusing to employ him. I'm not going to defend someone who was an idiot - but isn't the retribution quite disproportionate ? I don't think that making a comment, as disgusting as it was, warrant to have your entire career destroyed.
- And well, two rather well-publicized examples of other girls who just ended up DEAD because they were constantly bullied by people who posted their informations online. Amanda Todd and Rehtaeh Parsons. One girl who flashed her tits one day - too bad it was recorded, and you can imagine the mocking and bullying that ensued.
The other was raped when passed out at a party, with people taking picture of it. The crime has nothing to do with privacy, of course. The fact that once information is on the Net, it's nearly impossible to take it down, and that when something is linked to your name, it can follows you everywhere, is, though. These girls simply couldn't escape these events, even long after they happened.
Both commited suicide in the end.
Of course, I'm not saying displaying your name online will make you be raped or harassed. But it measn you give to people means to reach you, and once something is online, it's nearly impossible to take it out - meaning you can possibly not escape it. Also, it's to show just how much someone can ruin your life if he wants it enough and if he has your informations.
We have a right to privacy, we have a right to be left alone. Having anyone able to pinpoint you at will means that the only anonymity lost is the one of the receiving end - others can still grab your information without showing themselves, and can harass you without ever being in the spotlight.