After years I've only just worked it out so thought I would share. Under settings you can turn off other peoples signatures. I wasn't sure if I wanted to explain why I have BWood_horn's giant red yellow black pubic hair dye signature across my 24" montior to my manager if I wanted to check the football news at lunch.
Who is "Singnatures" and why are we hiding him ? Some Brazilian wonderkid right back who we're trying to keep secret til the Jan window opens ?