Probable mistype, you mean tldr.it right ? Just saying that as a cofounder of tldr.io, whose goal is similar to that of SkimThat: provide human written summaries ;)

What steps are you taking to mitigate spam and bias in summaries created by people?

I know if I wrote a summary of a Microsoft Surface article (I have one), it'd be very different from someone who loves it -- or is even an MS employee.

And spam... big issue there.

(disclaimer - I have your plugin and have tried it, summaries seem way too short.)