No Malware For You!

from here (source image one, two, and three)

A long time ago I arrived at a fairly simple principle about sharing malware: never give malware samples to someone you don't know that you can trust not to do stupid or malicious things with them. The fact that spreading malware is one of the techniques the FBI uses pretty much excludes them being trustworthy in this context.

(Inspiration - thanks to Howard Fuhs for bringing this to my attention)