Yes. I was spammed. Just like it happens in emails. They convinced me that they are legitimate guys who are really interested in my site & Blog. By the time I realized that it was just a Spam, I wasted a lot of time and efforts. Please check the below URL to see what happens if you let other people to post on you Blog without moderation.
http://undan.co.in/blog/archives/12#comments
I must say , these guys are so smart that they are finding new ways everyday to annoy people. 
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