https://xkcd.com/3126/

People's bot detectors are defective, so if you write at all, you're going to get accused of it at some point. It's not annoying, it's rude – and you're absolutely right to be off put by it. If the preceding sentence gave someone a conniption, good! I wrote it with my human brain, I'll have you know! Maybe we could all focus on what's being said and not who or what is saying it.