I have no problem raising pre-flop. But I don't play loose. I don't raise preflop to add money to the pot either. I raise to knock those crap hands out of the pot. Nothing worse than holding AA, and checking preflop only to have your opponent flop two pair, or trips. Yea, this can still happen with a preflop raise, but less hands in the pot means less chances of it actually happening.
Also, raising preflop is a good read bet. People calling your raise SHOULD have good hands (pair, over cards, maybe suited connectors). If you play freerolls tho, expect to get calls from 24 offsuit or similarly bad hands.
You gotta have a hand to win, and you when you get that hand, you have to make sure you protect it and get those crap hands out.