Formal when angry
I don't particularly care for smogon's tier system, but I do find myself using their rules quite often like the sleep and evasion clause. It's mostly out of habit. It gets me in trouble though because most of my friends like to use banned pokemon and hacks. I have to deal with spore Breloom putting half my team to sleep and Multiscale Dragonite everytime I battle one friend. Not that their unbeatable, but just ridiculously annoying.
I think I'd be a bit better if I built my roster as a team rather than 6 individual pokemon. I never really think about the synergy of my pokemon, and just rely on knowledge to get by. Besides, once the Pokemon Bank comes out, I feel like they'll be a lot more to worry about with more Pokemon coming into circulation.
I don't follow Smogon rules myself either, but that's more because I battle for fun rather than anything else. I don't mind if someone wants to play with Double Team, or use Sleep Powder multiple times, or whatever have you. Granted, some are more unsporting than others. Bright Powder isn't a big deal, but I can see how Double Team or Moody can be.
But then I only fight people over the Passerby system, since I find it bothersome to only use 3, not see nicknames, and not be able to Nice! someone afterwards to at least try and say "good game".
Although I should probably pay more attention to the challenges I get, I tend to not notice the "No Restrictions" bit and find myself fighting level 100 mons. But hey, it's all in good sport.