Let's just add a rule: if an opponent disconnects (more than once), you can decline to play against them without explanation (due to suspicion).
I had a funny situation: the opponent disconnected, I waited for him because it was a tournament, and he explained that he disconnected due to his personal (home) problems (but apparently, he couldn't write about it before).
Are you married? If not, you won't understand! Sorry for the off-topic, but it's directed at me.