Philmountains, it was a Romanian gang, not Roma, doing a large % of the robberies on the Coll d'Alba  around 2 years ago. But, it is not exclusively them at it, locals, gypsies, English, Moroccans, Sub Saharan Africans all feature...

You are only going to escape the full force of the law shooting robbers if you can show you fired warning shots in the air, the ground between you, then finally to save life and limb, the burglar. In the heat of the moment, the actual order might be variable, just remember to get your story nailed down right.

The Mossos and Locales are really very supportive if you give them a good beating though, especially inside a fenced piece of land or house. They will do almost anything to help you out and are not in the least bit picky about any tricky details or evidence, unlike the UK, they are 100% on our side.