banning accounts upon key words/phrases

[metulburr]

And by "error message" do you mean something telling them explicitly what to change or just that the post failed? I'm ok with having a specific message telling people not to have "https://" in their subject line.

Im playing with (testing) the original plugin from the OP. I commented out the banning user call, and it blocks messages with words/phrases given in ACP options. It does not allow the post to go through and sends the user to no permission page. I personally would rather have an error message above the editor, like the no links plugin (im tinkering with it trying to do just that). As is now, it currently sends the user to the no permission page with a list of reasoning's why they are there. And then i added clause to spam content in posts. I did not specify http :// in this message because i thought that would give away to spammers what to fix....but if you want me to i can?