Alternatives:

1. Don't allow self zapping of obviously harmful to self wands
Pros:
*Infinitely easy to code
*People die less

Cons
*Reduces !!FUN!!
*Lowers consistency between wands
*Can't hide "wow you're a dummy" messages for people who still zap themselves

2. Don't warn people who self zap bad wands
Pros
*Increases !!FUN!!
*Still easy to code

Cons
*People will bitch when it happens to them by mistake

3.Using a popup
Pros
*lets people be idiots if they want to be idiots
*doesn't let people accidentally kill themselves

Cons
*Lowers consistency between wands
*Uses a popup