I've been trying to come up with ones appropriate to me, but I'm having difficulty with the pithyness -- after all, nobody reads the fine-print warning labels, so these can really only be a few words (maybe 25?) in length.
Beware of sharp tongue, and sharper teeth?
May be hazardous to spare closet space?
Prone to fits of fiscal irresponsibility?
I know there are worthwhile wordings out there... and I think I'm egotized enough to withstand whatever you may offer... so anonymous submissions are as welcome as attributed ones.