Well, cleaning the gene pool is a commonly used explanation for eugenics and ethnic clensing. Surely the lemmings upvoting this are all about that?

Also functionality there is no difference in outcome if you take someone like that and exile or imprison them. So there is an argument to be made that the real problem is people putting those floaters in power in a democracy.

Celebrating the death of somebody you loathed is more in the general direction of mob justice.