A friend of mine keeps doing this. He'll pretend to be an expert of fucking anything, and you can generally tell immediately that he doesn't know shit. When he goes on about things that I actually do know things about it's unbearable, and of course his ego is too fragile to handle being told he's wrong.
We have a lot of impressive common friends with awesome general knowledge, and I frequently wonder how the hell we have the patience to keep him around. My general knowledge is shite, but at least I'm quite open about being ignorant.
He's hyper sensitive about social situations, yet introducing him to new people is almost always embarrassing.
Perhaps unsurprisingly, he is a professional psychologist.
This is how it is in mbin. Well, over at the instance I'm using at least.
I find it amusing sometimes, because I can see whether posts have been liked from Mastodon or other services. Gives some insight into how interconnected we really are.
I guess over at Lemmy you can't currently tell if your post is boosted by a Mastodon user. Sometimes they are, and in theory they can kind of live a life of their own from there on. It's fun to be able to see when it happens.