I always took them all whenever I found them - horrible things, I love them covers it perfectly.
But also, I wouldn’t just leave a kitchen knife lying in public. Most people can be trusted to safely avoid the danger. But what if a child, or someone intent on harm found it?
The responsible thing to do is to remove the threat from the environment.
The d&d game summoning the devil was always my favorite. Always love a d&d episode.
Also any one where the pope is shown in league with someone unlikely - communists, jews, muslims, etc.