>The term dog whistle is regularly used as a covert form of Ad Hominem that I find logically annoying, basically "ignore everything this person said because" insert assumption of what was meant and derogatory term about political affiliation.

Agreed. "Dog whistle" basically means "I can't find something to attack in what ideological opponent said, so I'm going to pretend that what he said actually means something else, and attack that instead".