If you dare venture on Twitter (I'd advise against it) the posters on there who are against the prosecution of online posting are very confused about free speech claiming it doesn't exist. I have pointed out, though I fear made no impact, that there is free speech but there is no immunity from the consequences of that expression of free speech. It is a distinction that they sadly do not seem able to comprehend. #donotshoutfireinacrowdedtheatre
I also agree that it is an immensely difficult area to police, I do not envy the various agencies that have to deal with this issue.