Thread:Merrystar/@comment-16338035-20160821134952/@comment-3542404-20160821161022

See Help:Blocking FAQ:

"If a user or IP is publishing spam or vandalism on your local wiki, and you feel that this may be happening elsewhere and the user or IP may need to be blocked on all Wikia wikis, then please contact Wikia staff or contact the VSTF."

Side note, it's unlikely you can request a blanket block for sock-puppetry, this is more often used for vandalism and spam.