I'm not sure if this is the right place to ask this, I've been on mumsnet a while and posted a few times but have become a more regular user since getting the app!

My question is I see an awful lot of people saying they have changed their username for anonymity, I don't understand how that works, if I changed my username now, would it be like starting a fresh then? As in no one could see the things I'd posted under my previous name?

Also has something happened to cause this need for more security? I can't imagine anyone would be too interested from my posts trying to find out who I was in real life is this something that I should/people are concerned about?

TIA x