You don't have a right to drunkenly accost someone and get all up in their personal space,

I'm sorry but the article does not imply there was any such interaction - where has this accusation of "accost" come from?

There is no such accusation even from the party involved, in the linked article, that the man's behaviour strayed any further than simply sitting down prior to being asked to leave.

Cowton said the man had sat down next to her and refused to leave.

He was very intoxicated and I felt a bit unsafe around him, so I asked him several times politely to leave,” she said>

This is the issue with these stories.

You seen accusation of someone approaching another in an aggressive and threatening way.

Equally - it doesn't take masses of imagination to see the very same quotes from the article above and see a bloke who's had too much to drink sitting down, being told he isn't allowed to sit down.

Now of course, that doesn't make the following behaviour acceptable but equally - there is absolutely no evidence of what you are suggesting prior to the assault.

Even the victim party seems to make no claim as strong as your own there.