Being a bellend isn't an offence. He's done something stupid and insensitive to impress his mates and show how brave he is and now it's backfired on him.
http://m.theargus.co.uk/news/11822282.You_silly_little_boy__Police_organise_meeting_with_family_of_teenager_who_mocked_deaths_of_Leeds_fans_in_online_picture/?ref=mp
Bit of an attention seeking plum.