Given your point about the donald, you'll despair at https://academia.stackexchange.com/a/117289/86725. Check out the history and the comments-moved-to-chat. Answerer suggests creating lots of social media accounts as a way to drive bad search results about you off the first page of Google, and lists a bunch of possible sites to sign up to, including Gab. The mention of Gab gets censored by a moderator, but not before various Academia Stack Exchange members have chimed in to opine that:

1. Mentioning Gab as a possible site to sign up for is "pretty blatantly out of line" and a violation of the Stack Exchange Code of Conduct, and

2. If they discovered that a job candidate had a Gab account, they would throw out the application based upon that fact alone.

So it's not just internet communities; we've got academics openly bragging that even engaging with a community they politically disapprove of, regardless of your individual views, will lead to them barring you from employment in academia.