Instead of reporting his horrid tweets to Twitter, let the tweets stay as live links for future use.

As I understand it, when tweets are reported, Twitter locks his account until he deletes the offending tweet.

Deleted tweets are useless.

Screenshots of awful tweets are questionable. Archived links of tweets are useful but having a live link is the key.

The best way to make a club owner rethink his choice is to forward him live links (along with an archived link in case the original tweets happen to get deleted).

I implore you to stop reporting his tweets. Let them exist as all the evidence you need of his despicable character.