It does sometimes feel as if one is under siege.
I'm not on any of the more popular 'soshul meedja' sites, except our village facebook thingy. I'm not anonymous on there, and everyone else posts as themselves. I find it extremely useful, to catch up on village news and events, plus to know whose dog is missing, whose hanging basket has been nicked etc. Especially during this pandemic, when we're all rather isolated. A chap up our road keeps bees, and a neighbour posted an SOS for him to advise about a colony of bees in his roof space. Help arrived and all was dealt with.
But my more savvy sister has warned me about being very careful online.
There are so many crooks 'out there' just waiting to grab information to access bank accounts, identity etc.
I sometimes 'lurk' on Mumsnet (don't post, just have a look) and there are such a lot of nasty trolls 'giving it the big 'un'. Spiteful, hurtful and over-critical. The site has been called the Nest of Vipers! But their moderators do remove these vituperative comments eventually.