So I had a server (running several sites) hacked recently and a low level user account was spinning up lots of processes (sending spam) that were crashing the server repeatedly. Out of frustration, I deleted the user.
I immediately regretted it and started getting 500 errors on every site.
In the last days an individual user tried to spam ubuntux.org several times. Maybe you have seen this advertising posts on the front page. Of course we deleted this unwanted spam as soon as possible.
We like to inform this user that he should immediately stop this behaviour otherwise we will initiate the necessary consequences.