Does anybody know someone named G1ad0S?

Today, someone by that name added me as a friend. I declined it, thinking it was just another random bot or something trying to get in on my list. But they came again trying to add me, so I accepted and asked them to say who they are, thinking it might just be someone I know on a smurf or something. They said nothing.

I'm a bit concerned because there are some stories I hear about people on some online games who get their information compromised just by adding someone onto their friend list. This G1ad0S person doesn't have a very active match history at all, so I feel a little anxious. Does anybody know if adding a person onto their friend list gives them enough potential to hack somebody?