First of all, thanks for the kind words.
Now, to your questions:
- If you specify a minimum number of posts in the Exceptions panel to exclude users from the spam word checking, all guests will able to post spam! This is probably because all messages that are posted with a guest account are added up, creating a situation in which the guest account will almost certainly meet the minimum number of posts.
Is it possible to exclude the guest account from being checked for a mimimum number of post?
I have never experienced that. I have it set to 50 and I am not able to post spam words as a guest. Besides, only posts made by registered users are counted.
- I would like to enter warning messages that are longer than 255 characters. Can you implement that?
Theoretically yes - but it would slow down the performance of phpBB when posting a message.