Guilty. More than once.
There's this one time I bought a hamster as gift for a girl. I told her to close her eyes and open her hand, then I put it in her palm. The next thing I know, poor thing flew 2-3 meters up in the air, heard some screaming and cursing. Turns out, she hates rats, and she thinks of hamster as a rat. #%#@%#%^&#%$...!! That poor little cute ball of fur... Rats..!!!!!
Have you ever give hamster as a gift? orz