Invalid Report: 76561198151778489 - ([CSGO] Counter-Strike: Global Offensive Items)

You Shoul report these type of situations on his Steam Profile:
In order to do that, you have to:
1. Visit the accused's profile
2. Click More drop-down located at the top right of the page
3. Choose Report Violation
4. Select the violation, then describe it and provide the evidence
5. Click Submit Report?
Click here to view the animated gif that shows how to report a violation.

Steamrep does not investigate:

Link: http://forums.steamrep.com/threads/notice-changes-to-investigation-policy.47952/

To prevent receiving these fishing links just avoid adding people with private profile and with few hours of game played.

Hope this helps, GL.

Due to changes in our investigative policy, we no longer accept reports on phishing links. We consider malware links as the same type of scam, as both are an attempt to hijack the account.

http://forums.steamrep.com/threads/notice-changes-to-investigation-policy.47952/