Before they arrived, the people at the centre hid the ballot boxes and by the time the police were there they were sitting around playing dominoes
This is great, but I think it's fucking terrifying that in 2017, in order to express an opinion in a ballot (and btw- whether legal or not, that's all they were really doing, isn't it?) people have to hide from their own police force, and use tactics that wouldn't be out of place in a Dario Fo play.
What the actual fuck were Madrid thinking???
They could have just let it go ahead, and treated it as an opinion poll, instead all they have done is galvanize many more people into action.
If they were aiming to push Catalonia further towards demands for Independence, they've done a fucking good job- so good in fact one has to wonder if they did it on purpose! 
And shame on the police for their actions, disgusting thugs. I don't care if they were just following orders.
Nothing but respect for the "Bombers" (firefighters) and some of the local police, who formed human barriers to protect voters from the riot police, at massive risk to themselves, and their jobs.