They are. A related example is criminal gangs tageting gun owners in France after the dataleak at the sport shooting federation. This one has been well covered. There have been a few hundred targeted robberies (on old people mostly) and one or two deaths (predictably).

In Western Europe there are also foreign burglar gangs that go on sprees for a few weeks. They're well organised but don't have time to do the stalking. They use publicly available data as much as they can.