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.😃