Let's put it this way:
NEVER limp with your premium
hands - ALWAYS raise.
HOWEVER - since you are a good poker player, the words ALWAYS and NEVER are not in your vocabulary.
Officially, you should be raising these hands - even more especially if the table is filled with limpers. But there are situations where limping in is not only permissible, but prudent as well. But for some of you those situations are less than what you are thinking.
If you are limping because you want more (or as many) people in the hand to go the flop as you can (thinking you have them trapped) - then just flat out, bottom line - this is a very bad play that will put you in predicaments you would rather avoid. A killer scenario - you have AcAd and limp in UTG and 6 of you see a flop of AKJ all spades. YAY, you hit top set and think you are gold. But out of 5 different opponents, is it probable (beyond possible) one of them is holding two spades? Absolutely! Is it possible one of them holds QT? Absolutely! You hit top set and still have tough decisions on the next two streets - God forbid another spade comes out.
Two situations to limp:
Short handed (not 6-max) - If you have set up the situation at the final table with 2 to 4 of you left, limping monsters can be pretty profitable.
There is a super-aggro player downstream from you whose battle cry is "death to limpers". Set that sucker up. But if you are not sure you can get a limp-raise in, don't do it. Raise it up to your standard open raise (whatever that is for you) and know that the
odds are in your favor to get a caller that you can at least attempt to put on a range.
The point is your worst situation on this hand is to go to a flop with only one BB invested. Whether 7 people are in the hand or just two of you, you have no idea where you stand after the flop - except that you have top pair. The bitch is the average winning hand in hold 'em is two pair - so you could very well be crushed before you even get to the turn.