Sometimes I play at a site with alot of new players. Usually the game is ultra loose. At the 10 seat tables, usually 8 players see the flop. My plan has been to restrict myself to what hands I do play and then I play them very aggresive. The problem is that usually many players call my pf raise which give me pretty low chances to win anyway. Lets say I have pocket aces. With many calling people, I will eventually win, but the variance is so big.
Another thing is that if I make a super big raise pf, they will now about what I have. However, I do not know what those maniacs have. I suddenly just get the raises back on the turn and / or flop when someone has made a set or hit two pairs.

What shall I do?