Look mate, stop creating strawmen. Argue why you want espionage instead of creating false analogies.
... by putting you into a religion that you only have in one city while being in Organised Religion, you will lose hundreds of hammers for five turns empire wide; Or another exampled would be that you'll lose happiness and science if you were switched out of Free Religion and so on. <- Argue these points instead of creating strawmen. We are all adults, we can debate this without resorting to logical fallacies.
OK next I will respond to my old teamate "Benedict" nabaxo

, just because I see he's currently online...
What strawman did I create? Seven was the one who literally came up with a 'strawman' hypothetical-superunit. All I did was cite actual game mechanics. So the analogies are not false. I defy you to explain how my analogies are false. And I have already given reasons I want CSM allowed, which you must not have read but here are some more...
1. Because I LIKE IT and intend to use it if there is a good opportunity to do so
2. Because we just spent the last 2 years running an EE and I learned alot of skills that I want to bring to bear
3. Because playing with ALL the settings that RB wants and is used to playing with gives them an advantage. We are already likely giving up nukes. I want to keep Espy a least. Everyone should be a little out of their comfort zone on some things and in their comfort zone on other things.
I have more, but that's enough, to make my point...
Now to address your other points
... by putting you into a religion that you only have in one city while being in Organised Religion, you will lose hundreds of hammers for five turns empire wide;
If you don't take the time to spread religions around your cities then you are playing poorly. We should not ban CSM to subsidize poor play. Spread the religions around, and you wont have this problem. Plus if you have allies and you are properly prepared, they can switch you right back.
Or another exampled would be that you'll lose happiness and science if you were switched out of Free Religion and so on.
Same thing, have your ally switch you back. But the larger point seems to be that you don't like the CSM because it causes harm... "I'll lose hapiness and Science if this gets used on me" is what you said. So what? I don't get it

I cant do anything to you that will cause you to lose hapiness and science?
Or is your point back to the argument that it does so too cheaply? Well if that is your point, then I say ... If its cheap for me to CSM you, then its equally cheap for you ally to switch you back, and no hardship is worked on you.