"a few details" may be said to much.
What I actually see is, that users shouldnt be able to register from blocked ips.
They still can do so, but they cannot do anything on the page, as long one doesnt confirm them.
The other thing, I would like, that spammers if they use forbidden words, get blocked and not that the bad words get changed into stars *****. This does not really help me.
Everything else seems to be very well actually...but...Spammers never sleep !