I'd rather see a "-1"; so when I go back to the results because the result didn't match my need, I could indicate it (w/o a full ban). I'm not likely to ever return for a +1 result, since, almost by definition, I'm done searching at that point.
- Install the Personal Blocklist extension in Chrome: https://chrome.google.com/webstore/detail/nolijncfnkgaikbjbd...
- Click on a search result, then click back, and you'll see a "block example.com" for that snippet.
The first option is easy and always shows block links; the second option is server-side, so the blocks work on different browsers.
Regardless, I love what Google is doing here in taking individual consideration into account.
However, we have seen several cases where the usage of the functionality slowly drives how the feature is morphed and I am guessing Google is experimenting with the button initially to see how the users like it and would try to weave other functionalities around it.