Open limping

[w_alloy]

I've found myself open limping mostly from CO and MP increasingly when both blinds are very loose and poor postflop (especially if they dont get pot odds) and everyone behind me is very passive. I do this with hands like 89s, Q7s, and Q9o. Should I stop? How loose/passive do you need players behind you to be, and do they all need to be as such? Should I start open limping some middle ace hands also to disguise (this is 5/10 so the answer to the last question is no, but would you in higher limits or if the rest of the table was 2+2)?

Also, when are other times you open limp? Ever 9Ts or TJs UTG in a loose passive game? Blind wars dont count.

Am I out of my mind?