I think this is why you should raise JJ from UTG this way higher pairs will be likely to reraise you preflop. Now I think you have to either fold to this reraise or play JJ for set value only though. Some players may reraise you preflop with AK however and that makes things much more difficult. Hands like this are one of the reasons I switched to a site that allowed a 100 BB buy in as opposed to a 50BB buy in like Party Poker. I think you need to play JJ for set value since you limp/called but with your flop bet you have to fold to that reraise. Lots of players will bet out AK on that flop when checked to in position, but not nearly as many will reraise you there. If they do then they are bad enough that you should get their money in the end.