So, let me get this straight. ArfNarf joins the server, and notices the sign that explicitly stats that HE grenades are against the rules. ArfNarf, seeing this, decides to use one. From what I can tell, he was aware of the sign. And then after he's banned, (no big surprise there.) he decides to make a drama topic about the server that he broke the rules of. It's pretty clear who's in the wrong.