Looks like Freshdesk is not the culprit but Google. It automatically adds docs I visit on the web to my list. I think I owe freshdesk an apology for thinking that they are spamming me.
I started the day off sympathizing with them because I thought Ben was not right in saying they ripped off the name. But now Freshdesk has proved that many of the commentators here are right. They are spammers and they even spam your Google Docs. See the screenshot here. http://twitpic.com/7p0m3o