One little thing I thought I'd throw in is that playing against crappy players, while very profitable long term, does involve increased variance. There's no way you shouldn't beat these games long term if you've plugged all of your leaks, but you can expect to take some brutal short term losses at times. Yes, with multiple people calling down all of your bets with big hands, they won't hold up as often. But when they do hold up, you make so much more because of the chasers.

Remember a couple of key points:

Don't pay off chasers (especially flush chasers...so many people play suited junk!)

Don't play while on tilt

Don't try to bluff bad players (exception: As fishstick noted, backing up pre-flop raises with post-flop bets is ok against all but the fishiest calling stations. Your post-flop bet in a raised pot is usually big enough to fold out people without a solid hand, and it's usually heads up if you raised pre-flop so you only have to bluff out one other player. Save your bluffs for raised pots.)