This could also be used to describe certain people that do stupid things that endanger others. The ones that if there were more like them, there would be more accidents, disasters, and the like.

For example, people who drink and drive - the more there are, the more car accidents, the more deaths. Or presidents who sell arms to other countries. Or people who have problems with road rage

The people who we really wish would off themselves in a manner that affects nobody else, before they do harm someone else.