Bubble Play - Limpers and Mini-raisers

Ok, as soon as my withdrawal makes it into my Neteller account I'll have SNGPT, but until then can someone give me some general advice on consistent PF limpers and mini-raisers on the bubble?

Every time I have what seems a marginal push, someone comes limping in front of me and I can't pull the trigger. Assuming limpers/miniraisers have greater than 8x BB, what do these players do to your fold equity? Can you just treat their limps like a check and push anyway? I feel like I'm squandering a lot of good situations by being afraid to push over them.