Personally, I disagree with the close votes on the question. There is a possible case to be made that it is only about undergraduates, but since such academic internships are frequently pursued with an aim towards graduate school, I think that still makes it sufficiently on topic.
I think that your question is based on mistaken assumptions and aims at a rather obnoxious behavior. My feeling is that many of those close votes may have been influenced by a dislike of internship spamming and the attitude that goes along with it (which is reflected in your question as well). However, just because a question is wrong-headed or reflects an odious attitude doesn't make it a bad question. In fact, I think that it is a very good question for that very reason, because maybe some fraction of students who go looking good methods of spamming professors will come across it and realize they are using the wrong tactic.
If others show agreement with this position, then I would vote to reopen.