Allright, I don't know how many of you are from the South, but from where I come from you can TOTALLY slam someone, almost to their face, as long as you say "bless his/her heart" afterward. Everyone around you knows what you're talking about and usually nods in sympathetic agreement; i.e.----

(all of these must be said with your best Southern drawl)

"He's just as dumb as a stump, bless his heart."

"She's just a little ho, bless her heart."

I'm not really sure if this would go over anywhere else so please use with caution in your area of the country (world).