E.g. for A you could say “That’s a misconception” and try to leave it at that.

For D you could rebuke or ridicule. Like “That argument comes from intolerance rather than reality - it makes you sound like a zealot” or “Why do you spend so much effort thinking about penises gliding into anuses”? Or just “Oh my GOD I’m so tired of hearing that old myth. Can you find something better?”

For E, the Twitter approach, something snide and aggressive. This will however just make them double down and feel like they are right and their opponents are glib assholes.

These were just some quick examples to illustrate that your intentions are important - by no means all possible or even the best responses.