We've decided to restrict said clan tag from our servers as the community (as a whole) this tag belongs to is a negative influence to our community.
We're opting for this solution as we want to distance ourselves from them, while not limiting anyone from playing with their friends.
The Jailbreak server kicks players using the tag in question automatically, along with admins who will enforce (by warn, kick and ban [in this order]) this rule on other servers and whenever one tries to bypass this restriction.
If you want some hard reasons as to why it came to this (and why it is the right decision):
Spoiler:
Show
Thanks for understanding.