> On personal anecdotes, I've used the same internet identity across all platforms and it's not hard to locate my real life identity from there...since like 20 years ago when I got on the internet.

Me too.

> So all the good reputation and bad reputation followed me through, and surprised me in best and worst way.

Not so much for me, AFAIK. I think quite simply, pretty much nobody could be bothered to look for it.