Adding the letters ESF in your user title

[TwisteR]

I noticed a while back, a few months ago, that when you try to add the letters ESF in your user title, it replaces the ESF letters with "***"
Just curious to why that is.

 

[DiebytheSword]

No one should have ESF in there title but the ESF development team. Some people have snuck by it, but it's generally frowned upon.