It is a scam, nobody follow that link for your own safety.
DAT UNRELATED NECRO
Comment below rating threshold, click here to show it.
On the bottom right of your friend's tab, the middle button allows you to type in a summoner's name and look at his profile. To the right of that is a button to type in a summoner's name and it will send him/her a friend request which they will need to accept. If you're just looking to see what someone's stats are or something and you don;t have the game open for whatever reason, lolking.net is a database for all summoners in the world with more in depth statistics for every player.