I really believe this is the right path to handling BL. This will provide added information about each account and will in some way block malicious threats(it will require some time but thats fine).

Anyway, it would be great to have an option on each profile where a user could follow the blacklist options of another account. A bit like trail voting but with a more direct approach. Basically what i mean is that:

I (or any other user) do trust @blocktrades , that means i trust his choices. I would just need to open blocktrades profile and click on a button to prompt me if i wanted to follow his BL.

Like providing our witness vote but for BL.