i judge people with bad form.
the other day, there was a guy trying to do incline bench press, 225 pounds or so.
his back and ass were so far off the bench, the only part of his body in contact with the bench was his upper back.
i wanted to point it out to him that the flat bench was right next to him, not being used by anyone.
Eh, I don't really have a problem with that considering so many people have horrible form. I figure if they're in there doing something, then it at least beats doing nothing, even if when they brag to their friends about "how much I can bench/curl," they're completely wrong.
The only issues I have with people at the gym--regardless of how long they've been going--is just a general lack of consideration and respect for other members. Re-rack your damn weights. Don't take up a piece of equipment for 30 minutes while you're talking to your friends instead of working out. Don't slam your dumbbells on the ground when you're finished with a set; if you can't control them on the way down, it's too much weight for you to begin with. Don't ask me how many sets I've got left when I'm in the middle of an actual set. Wipe your sweat pool off the bench when you're done with it. Don't monopolize the squat rack to do barbell curls when it's obvious there are people waiting to actually do squats. Etc., etc., etc.
As for p90x, it'll work great--as would doing an hour's worth of free weights at the gym five times a week while watching what you eat. The main benefits to the program are that 1) it's "pre-packaged," so it tells you what to do and how to do it, and 2) you can do it at home, so it appeals to those individuals who can't/won't get to a gym regularly.