protecting pub-keys from unwanted signatures

[Robert J. Hansen]

> People are stupid. Not necessarily any individual person, but people at
> large are.

https://xkcd.com/1386/

> If you rounded up all the signatures on a key server,  and just started
> deleting them at random,  any given deletion is significantly more
> likely to weaken the Web of Trust than to make no change, therefore,
> mathematically, every signature strengthens the WoT on average.

This is quickly becoming tendentious.