Speaking for me, i didn't, and if you felt like i did so i'd like to apologize. Even the best players go wrong about something sometimes, and i strongly disbelieve that, for instance, TMIT would think someone calls him a newbie just because they try to answer the question as understandable as possible. Just remember, there are people here (including myself) that are reading this forum and lots of it's threads to improve their play, and they're not necessarily IMM/Deity players. Your question is a good question after all, and as far as i can see all posters tried to contribute to the discussion in a way that alot readers can get something out of the thread.
This won't always work
If you actually HAVE a strategic resource in your vicinity, opening up with warrior first and choking a neighbour can be very good. If you do NOT have a strategic resource, you may end up choking with crappy units for a very long time. Also remember that choking one neighbour will enable the other AIs to settle his land, improving the chances of a runaway AI with 12+ cities in the BCs.
There are more things to consider.
a) What will you do when your target is very far away? It's pretty likely your worker will either take ages to move back to your land, or that it will be eaten up by barb animals
b) What will you do on mapscripts where you might end up isolated? Warrior first is a sure waste here, and you don't know if you're isolated @ continents or fractal.
c) How do you want to effecivly choke a Deity AI that starts off with 2 cities, which increases the chances that it has a strategic resource right away? Some of the AIs even settle ON TOP of the resource, in which case you're totally screwed.
d) you declare on an AI in order to choke, then you realize that the AIs BFC has little forrests. You're pretty much screwed. You can avoid this with proper scouting before you start your attack, but this isn't always possible. Sometimes the AI also guides his workers early on, what will you do in this case?
There are alot more things to consider. To not go for worker first isn't necessarily bad, but you will need to know what you're doing, and even then bad luck may strike you. With worker first, you're alot saver in this regard
Yeah right, just "keep the economy afloat". That's the problem: it's not guranteed you actually get your worker, get it back to your land and maintain the choke until you're able to kill your target off. You might end up without workers for a long time, and the other AIs will still be in the game and far ahead if something goes wrong.
As i already mentioned, that is not viable for any mapscript anyway: You will want to elaborate strategies that will make you win most of the time, not only some time and on one particular mapsetting. If you're fine with starting new maps over and over again until your strategy works out i'm okay with that, but that kind of play is pretty situational, and a classical has nothing to do with "taking away the killer instinct" - it's just the best way to win most of the times.