I have to review this question https://chemistry.stackexchange.com/questions/7919/vashikaran-mantra-in-hindi-91-9636465464 what we should do for delete it vote for closing it is the right thing to do? I know that many question are closed but still visible...
Anything but Vashikaran. :o
To answer your question, spam flag it. 6 Spam flags delete and lock the post, and feed the post details (and user details) to a spam tracking system that gets smarter and is able to catch these posts with decreasing human intervention.
This particular spammer had barraged Physics and AskUbuntu a couple months ago, and was pretty persistent. Hopefully the new spam-battling can aid us here.