Raise them and collect the blinds if that's all you get. The reason is - if you don't raise now and then raise AA/KK later, people won't give you action. They will think you are tight and know you have a real hand. If you raise early and often, then they will view you as a loose player and/or blind stealer. If the table is that tight, I like to start raising some more hands in position just to keep a looser image. If you get called and miss, then let it go. If you get called 1/2 the time and miss, you break even and get the loose label still.