Well in the beginning, I joined the BaseBuilder Server and Coin was a CT, when the round was almost finished he reconnected so I used amx_quit on him:

He came back in a new map and reconnected again with the same problem, so I banned him for 5 minutes:

After that he evaded the ban, he didn't even wait for 5 min so I banned him perm.
Here are some SS about his attitude and behavior in game:

As you can see in this pic the map was just changed so he was the first reconnector:

In this pic, I warned him but he kept laming:

Hope you understand.
http://www.ambrosia-servers.com/community/index.php?topic=13841.0