Actually not trying to spread FUD at all. I'm the founder of one of the companies detected, Lookery.com, before that Compete.com, which relied on 3rd party clickstream sources.

It's not the data that is sent that is a reason for concern but the "cookies" attached to that data especially when unified across sites.

Anyway the reason to use the tool is to alert you to what the page your on might be doing. I.e. Visit any popular newspaper site and you'll that beyond web analytics trackers and ad networks your data is being sent to behavioral tracking companies like Tacoda and Revenue Science.

Thanks for the comment, ;dc