Quick question, are they ever worth playing? Even limping in?
(note: I'm not talking about AK down to QJ!)

Wosrt thing you can do is limp with them really, they make nice hands to bluff open with in LP in tight games I guess.

I used to limp into cheap pots with them, but I suppose in the long run they lose you money. I'll leave them alone in the future

It depends on the pot odds. If your in late position and have lots of people calling before you, sometimes it's worth limping in because the pots big enough to justify your loose play. If you hit the board (flop a set, straight or even two pair) there is a good chance you can with the pot there with a strong bet.

If you airball the flop your only committed to the first bet and can easily toss away your rags. However a warning should be said that if you partially connect with the flop and overplay this hand you will loose lots of chips since a premium starting hand probably will stick around and has a good chance of catching up.