In Kyoto convenience store owners can put a sign in their windows indicating that taxi drivers on breaks can park there for as long as they like on the grounds that this reduces crime. And it seems to work, if the reports are to be believed:
Since the program started in September 2013 the number of armed robberies among participating stores dropped to four compared to 18 in the previous year. On the other hand, the shops which were not in the Midnight Defender Strategy saw an increase in robberies, up from seven to nine incidents compared to the year before.Overall the total number of robberies was nearly halved in the prefecture.
(emphasis not mine)
I haven’t seen the data, but it seems like a good idea to me. Unless the taxi drivers start getting robbed, of course.