ID scanning software that is used at nightclubs and bars has got the green signal from David Loukidelis, British Columbia's privacy commissioner.

A number of Nanaimo nightclubs and bars make use of the TreoScope software to gather information required to recognize and prohibit violent people for safety reasons.

Earlier in July, a Vancouver nightclub was blamed of gathering too much personal information about customers and keeping that information for a long time.

David Loukidelis said it was reasonable to prohibit the incoming of violent people into the clubs and bars.

However, David Loukidelis said the personal information will have to be deleted after 24 hours and the personal information includes only the photograph, name, gender and date of birth of the customers.

But, the personal information about a violent customer can be retained and shared with other clubs and bars via TreoScope software.

Speaking on the topic, Loukidelis said, "This means only information necessary to identify the bad apples will be kept, and that's good for all other bar customers."