BTW, from my past experience. C9 rarely fix their forum, not unless this annoyance goes all the way up to the top management. This problem has been existed way before the WP8 broken textbox. And I do not expect this to be fixed within 5 years time frame. Feel free to prove me wrong by doing it in the last month of 5th year.
first I will say "take the idea and tune it as needed - just make it work"
and yeah I think we have seen the C9 sometimes sit on an idea for a change but I can not control that... wish I could but ....
bottom line it sucks that some random account can be created and then used to fill up the page with garbage.
also as far as I am concerned if they are new and un known then why not limit how often they can create threads and post replies to threads ? I thought that if the limit had some kind of auto adjustment then a new person could over a few days make posts and be over the new-user period w/o much hassle.
but the folks who have been droping in an making like 50 posts in one hour and then never come back would be falling into a "tar pit" and would then have to get more creative or stop.
but it's a thing to try and it might help for a while at least.