Anon means noone knows your real name dave, so even if in one of your ranty posts you say something 'disgracefully misogynist/chauvinist/sexist' you will not feel real life consequences for it. They will not email your employer, they will not harass your family (we've seen that with one Jolla employee), they will not swat you which in US at least could cost you yours and your loved ones' lives
They can and do go after noble laureates, based on false reporting he got forced to resign from UCL and Royal Society committee (http://unfashionista.com/2015/07/21/...-sir-tim-hunt/ ), they can take down normal people much easier (just check the reddit thread for more examples how wrongthink and not agreeing with them in every possible matter can end up you being the 'offender' who has to be punished)