I'd put it this way: I recognise a very distinct difference between social anxiety (nervous and anxious response to being placed in social situations) and a lack of knowledge of social cues, rules and mores. The first is an emotional and psychological response to the experience of being in social situations. The second is a cognitive gap caused by poor socialisation.

The second one is the one I'd call "social awkwardness".

What you're describing (where a person finds themselves unable to function socially in a temporary fashion) is what I'd call social anxiety.

In each case, this is distinct from the point I was making in my original post, which is that when it comes to serial harassers, we aren't dealing with people who don't know the rules. We are, instead, dealing with people who are rules lawyers (and therefore know the rules very well indeed).