"Must...resist...urge...to make...joke."
Yes, you should. This is not a time nor
a subject for comedy--particularly insensitive
comedy.
It's OK. We laugh about it too - you have to or you'd go crazy!
And no, I have never felt the need to involve lawyers either, just be very careful and not trust anyone. I have had waitresses look at me and tell me with a straight face that there are no nuts in the peanut butter cookies!