Invalid Sharking Group

I am not really sure where to put this, or what format to use.
I was looking for a group on somebody's profile when I saw "TF2 Endgame"
The name interested me, so I read the description of the group.
It didn't mean much to me until I clicked on the link they provided.
The basic idea of this group is to look for low play time players with valuable items so you can shark it from them.

The group can be found here: http://steamcommunity.com/groups/TF2endgame

I am sorry if this is improper format, but I cannot think of anywhere else to report this.
Here is what flagged this for me (from the website):

The picture didn't come out as big as I wanted it to be, but clicking it makes the text readable

Please report this to Mann Co Trading or Harpoon Gaming as they handle all of our sharing reports for us. Thanks!

You can't get marked for sharking unless you admit to it anyway. Being in a group does not constitute bans.