I agree. Your resume is very important to you, it is a portrait of your professional self, so be very careful who you give it to. In wrong hands, this could cause you a lot of trouble... possibly, your identity could get stolen.
Having said that, I would urge potential job seekers to be skeptical about this guy. He could be genuinely trying to help, but reading the posting, one gets the impression that he is trying to take advantage of people in OPT. Here's why:
1. If he is a recruiter, there is no mention of his company or website. How do you know if he is legit.
2. Contact info is suspicious looking yahoo email. Does not look like a pro to me.
3. Bad grammar, especially for someone who is in recruiting business, definitely not a pro.
So, people, be careful. There are lot of scammers and hoaxters out there, particularly in the net, tread with caution.