I've just been beaten by two tiny pocket pair sets, and yes i raised preflop a dollar. perhaps i should raise 1.50, but a lot of the time no one calls that..
You really shouldnt raise thoes hands enough to drive off pocket pairs.

If you have a $25 stack, calling a $2.50 bet is often profitable with a small pocket pair.

so you need to raise way to much to get rid of the pocket pairs that are playing correctly, and even more for thoes who are not.