Paolo, yes, I'm deleting spam threads constantly, every time I log in there is at least one, and I also Permaban the user.
Just a minute before this post I've banned another.
Also, if in the banned users log you see funny ban reasons, it's because when I ban them I also write something funny for them to see as Ban reason
I'm doing what I can, only rarely I've erased threads that were there from more than a couple of hours.
Also, the IPs of the users are always different.
To everyone, when you see a spam thread, please Report the post, we moderators will receive it and we'll be able to delete it sooner.
The Report button, in case some don't know, is the yellow triangle high on the right of every message.