In reply to John Alcock:
Seems to be the Corsican way of doing things. A lot of organised crime in Corsica mixed up with the independence movement and the different villages having their own gangs.
The last time we were there there were three murders in a week, two on one morning. One was a defence lawyer who represented one group of thugs the other a well known local gangster from another village/family. We were staying in Bastia and heard shots fired one night. It was all very edgy but the criminals keep it amongst themselves.
Probably worthwhile being aware of all thus but not a cause for concern. Certainly it wouldn't stop me going back to what is a very beautiful island.