Yeah community/wiki style resources suffer the same problems. The abuse of the system is why they wiped the comments and made it more involved to rate a site properly. Ratings without a comment now also rank lower.
Using the default mode, when it blocks you however it does offer 3 options and one on them is to ignore the block and visit anyway.
It should not stop access to a site completely (perhaps in the most strict mode).
The system relies on people that know and trust a site to write a comment saying why the red circle is wrong.
Maybe look at it this way,
If angry idiots dislike your site or your friends site, they definitely will use a free browser tool to rate the site badly.
The only cure for that, is the friends of the site add more positive votes than negative, and get the admin to add a WoT key to their site.
By helping get rid of the problem for yourself, you also get rid of it for everyone else
I use it predominantly to report bad sites, rather than protect myself, but it is still the first plugin I install on any new browser, and makes me very aware of how important it is never to trust the paid for results at the top of search engines.