why do people put [fallen] after their name?

Lilith [FALLEN] had fallen in her Skype name and we were just talking about clans/guilds for games we play and eventually we just threw the tag FALLEN on. Barky's also someone we played a couple games with so he joined eventually. I have the Fallen title on RS3, FALLEN is my clan on this mobile game, fall was my tag on black ops 3, fallen was my tag on gta v and some other stuff too. DERP is the same. They played cod together a lot Idk about now. Anything else is cause they saw fallen copy derp its all for fun but fallen and derp like to roast eachother sometimes for the rivalry aspect

Anyways its just a tag people use when they play games together, at least thats how it first started. Me, Napalm and Snake played alot of COD together and came up with Derp Squad/Clan and used that as our callsign on MO as a symbol of our forged friendship. Soon Fallen appeared not too long after that. (See Kaizer's post) It wasn't made so we could be cool or seek attention. It wasn't that big of a deal until people started making it one and then everyone came up with their own Clans/Squads.