Why would you do that? Just because you missed out on one game you feel the need to shit on hundreds of other fans? Those FB groups generate many acts of kindness - I've lost track of the amount of times blues have offered up their tickets for free to allow a sick fan or someone whose fallen on hard times to go to a match. They're also great for the local lads who might not be able to afford to go to every game, those who have had to relocate and are visiting, those who can't get away tickets next to their mates so swap tiers, etc.
If you're going to report the Facebook groups, you may as well report BM too.
You'll be shitting on fans because you didn't get your own way.