You might see someone with +20, while I see him as -20 based on whose feedback I value (so I added them to my list). Point I'm trying to make is you can't control how someone else views you.
This is a great explanation. The only thing that I can't figure is who gets added (and deleted) to/from "default trust" and why/how? That seems to be the only thing that could be abused. Thanks.
You can check it on the page https://bitcointalk.org/index.php?action=trust
Theymos controls who are in the first level of the default trust system (those trusted directly by DefaultTrust https://bitcointalksearch.org/user/defaulttrust-122551), and then those persons can decide who are in the second level of the default trust system (those trusted by them).