Corsearch threatning legal action - Anyone else dealt with them?

Forum has been active for over 14 years. In the past Game Insight have promoted on their facebook page as the unofficial fan group.
Today received this email via my host.

We've NEVER had any hacked versions of the game, paid of otherwise on the forum. Any talk of cheating gets that member a ban. The thread they link to shows members reporting cheaters to GI, so that is false info right there.

I've removed a lot of sections of the site, such as the Wiki and a section where members can...