Bedbugs
So far, I'm lucky - especially so with all the travel I've done the last few years. Anybody unfortunate enough to have those little buggers hitch a stealthy ride into your home?
I know two people who have. The guy living under me had 'em (sure glad they don't spread!), and another friend picked them up, she thinks, on a flight.
And here I thought "Don't let the bedbugs bite" was an ancient thing.