I was trying to close this question as off-topic and I wrote a comment suggesting to post it on mathematica.stackexchange.com
But I could not do it because only three options were available, and apparently I had to choose between one of them to vote to close the question.
Now, either present all the sites (or give a way to specify one of them) or add the possibility to just vote to close without having to specify a particular site.
If there are deeper reason for the site behaving this way I apologize but I'd like to hear them! :-)
P.S. Apparently we have a mathematica tag which is supposed to be used for this type of questions, so I'm actually not sure if I should have voted to close or not. That's not the point however