Reporting HC Griefing - Question

Hi, wondering if anyone here knows how to report someone for griefing?
Just had a rogue intentionally try and vanish a group of mobs onto me that I recorded with shadowplay. Looking at general chat he tried this with a few others too.
Can’t see any options in game to do this as he’s not visible for me to click his portrait to report that way. Any advice?

Try reporting his name saying it offends you.

Report the name but in the comments for the report explain what is up.

Blizzard Support - Reporting Code of Conduct Violation (battle.net)

Behavior

Behavior that intentionally detracts from others’ enjoyment (such as griefing, throwing, feeding, etc.) is unacceptable. We expect our players to treat each other with respect and promote an enjoyable environment. Acceptable behavior is determined by player reports and Blizzard’s decision, and violating these guidelines will result in account and gameplay restrictions.

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