Here is the same troll with 4 more accounts, all 6 of his accounts joined clans. Right now, there are multiple clan managers working to kick out the same troll over and over.
That is why joining a clan should require players to be at least level 3, or have an account that is more than 24 hours old.
I hang around in global chat a lot, and i got a few alts in clan that are regularly open.
The general trend is that a lot of players join, immediately go inactive, and get kicked out a few days later.
All the inactive accounts not only kill (almosts) all form of community, they also continuously keep clans closed for players that do stay active for more than 4 hours. On top of that, it gives a wrong signal to new players if all they see when they join a clan is
New clan member! Welcome "{name}"" to the clan!, since it shows them that clans are not an active form of community.
EDIT: he made 8 more troll alts, who all joined clans before doing anything else. I hope and assume they will all get perm banned, but its just taking up some very limited space in the new clans, and not every clan kicks out inactives every few days. Maybe having accounts auto-leave a clan once they are perm banned would fix that issue.