vBSEO is filling my inbox with linkback notifications that look like this: http://107.21.250.135/oturk/hit?id=...RYVP2XLKB7&turkSubmitTo=https://www.mturk.com It appears that someone it trying to do some automated market research for Vimpat (searching for forum discussions referencing it). I don't quite understand this mturk Amazon web service, but I do understand that my site is being hammered by traffic related to this market research crap. I'd like to put an end to it, but I can't seem to find any information on the mturk system how to do this. I can adjust my .htaccess to block requests that have 107.21.250.135 as the referrer, but that isn't foolproof. Ideas?