A direct Example of the 2 facedness of the system here: check out Franky Boyles Twitter, the stuff that comes out on there is generally very offensive (I love you Boyle!! regardless of what i say here), yet he is not in jail. Yet we see the poppy burner, the guy that said mean things about someones dead dad, and a few others all in get arrested. The mob wants them to pay, and the police then back up the mob, such a bad precedent but too late now.
Another reason for the police jumping on this is that they are trying to look like they are not just there to collect speeding tickets and rounding up pot dealers so they have deciced to start a new war on socail media, hell the war on drugs was a good spinner maybe this is will be equally good. I dont want to sound completely negative, but where i live the police are not that well liked, in context it took 8 police offices to remove a man from a swimming pool for swearing at some teenage kids that were splashing him,
In closing my understand with UK law is that if you piss off someone powerfull enough the way the UK law is structured means they will always have something on you. I think thats the goal of the system to make sure they have something on everyone and then keep everyone in their places and no one gets above their station.