Ask HN: A Bolivian TV station stole my web app. What should I do?

I just gave my lil' moustache app a bit of a facelift and then decided to see (via google) what was happening in the world of online moustache apps. I then came across this site: http://www.reduno.com.bo/bigote/

Pretty much a complete rip off of my facetache.com! (Their copy is based on an earlier version. http://20.facetache.appspot.com)

I'm somewhat miffed at the whole thing. Partially amused and partially a bit cranky at their audacity.

Anyways HN, what would your response be?