This could be positive. So far things were gamed and manipulated to some extent, with some fake content, but it was never too obvious, and a bit of a cat and mouse game with filters and whatnot. Now, it's so easy to fake content that robust systems will have to evolve, or most social media sites will become worthless, and advertisers will catch up eventually when they are paying for bot-only sites. The downside of course is that these robust systems are hard to imagine without complete loss of anonymity of the users.
Web of trust weakens anonymity, but doesn’t eliminate it.
- You know who your online invitees are, but not your invitees-of-invitees-of-…
- You can create an account, get it invited, then create an alt account and invite it. Now the alt account is still linked to you, but others don’t know whether it’s your friend or yourself. (Importantly, you can’t evade bans with alts; if your invited users keep getting banned, you’ll be prevented from inviting more if not banned yourself)