If your own reputation is tied to the validity of what you represent to a particular WoT system, you'll be more careful.

I imagine a nuanced, "Level of Trust" system:

0) I know this person and would trust them to babysit my grandchild

1) I work with them, they're OK

2) I see them occasionally, they seem nice

3) Met them online, they seem solid

4) Online, prolly not a bot...🤔

5) Online, sketchy as hell...

6) Who the heck is THIS?

That's the gist, could be refined/scored in many ways.😃