In a way I think it's good that the cops are underprepared for this sort of thing. Having riot police trained up and ready to rock is a waste of public money if you only have a riot every second decade3. Policing - the cops are underprepared to deal with this sort of thing, in no small part because they've not had to deal with a consistent element like this since the good friday agreement if not ever. They are also under resourced. In light of this, how dangerous or otherwise dublin city is on a normal night is not entirely directly proportional to how something like this kicks off.