Also, going the ban way is a slippery slope. What about other potential tags like these, are you gonna pre-emptively ban all those combinations?:
IRA
ETA
UPA
SALO
FARC
etc...
there is many more that somebody will find offensive while to others it will mean nothing. Banning hardly solves anything given alo you will start seeing shit like 18, 88, 14 and more exotic derivations.