This may not be type related, but it's someone I noticed.
My ISFp father was extremely annoyed by insects buzzing near him. He'd stop doing whatever he was doing in order to pursue and kill the bug. It was as if he couldn't do anything else before destroying the annoying insect.
A few nights ago I had a drink with my present ISFp boss, and he behaved precisely the same way.
I'm not saying that I like insects flying around my head, but it's not the same kind of reaction. Also, some people will wave the insects away but stop short of killing them. But my father and now my boss would stop everything else to destroy the insect.
Coincidence, or is it perhaps type-related? I can see how a Si IP could be overly sensitive to something disrupting their sensorial perceptions of the immediate environment.