I'd agree with you Bren, and I've warned someone for doing exactly that, but this decision is purely based on the actual posts from that user and is purely my own.
Your point goes the other way. Isn't a regular poster complaining of trolls and duplicates just because they don't like the content the same faking injury?
I know for sure some of those accused of duplicate accounts are not duplicates. I can't exactly explain that when it's complained about on the public forum.
What would you have me do? I've chosen the action that I think will return us to talking rugby rather than individual posters. I tried asking for people to help the forum themselves. Most did. One didn't. A couple just poked fun for mischief sake.