Several years ago my site was red flagged by SiteAdvisor because I linked to Plimus, who I used as a payment processor at the time. According to my site's review on siteadvisor.com, other "bad sites" linked to Plimus, and therefore my site also must be bad. A lot of small software companies use and link to Plimus, and it turned out those bad sites were companies that sold PC monitoring software. I think it's unethical for companies to install monitoring software on employee computers, but that's a very tenuous relationship to flag my site as bad. I wrote to SiteAdvisor and finally got the status changed about 3 weeks later. I was left with a very bad opinion of SiteAdvisor because of its guilty until proven innocent nature. The legal saying "It is far better that 10 guilty men go free than one innocent man is wrongfully convicted" obviously didn't play into their business ethics.