Changing your name when becoming traitor

[Roomba]

I get that it's meant to make things easier for people whose gimmicks begin and end with 'murderman the man who murders', but what about people whose plans go along the lines of 'pretend to be your target, run around and annoy people, hope some of the more trigger-happy vigilantes off him'. And that's just off the top of my head. There's a reason identity changers/obfuscators are generally things that cost money/tcs.