In COD: Black Ops, you can now add the unallowed symbols into clan tags by editing your config. We can now set our clan tags to =FA=, and would be able to have =F|A= if the limit for clan tags wasn't 4 characters. :/
Anyways, you can find your config here
C:\Program Files (x86)\Steam\steamapps\common\call of duty black ops\players\config_mp.cfg
And the setting for you clan tag should be this:
seta clanName "=FA="
NOTE: i didnt make this!
No credz for me.
I wil make a awesome tutorial later. but i wil see when i got time