The bar owners were arrested under a 2006 law that technically classifies WiFi hotspot providing establishments as ISPs, and require them to store one year's worth of logs or connection records for anti terrorism purposes. This requirement is in place even if the WiFi network is password protected. [...]
It seems that most people aren't aware that even small businesses like bars, cafes, nightclubs, and restaurants that offer WiFi to their patrons are faced with these logging requirements. One of the arrested bar owners noted that the relevant organization, Umih, never noted this requirement when renewing his license:
"Nobody, not even the professionals of Umih who provide compulsory training as part of a license IV resumption, to me never said I should keep this history."
In response to questions by BFM Business, Umih admitted that the training doesn't mention WiFi logging but noted that Umih members should have known about this important requirement because it was mentioned in a newsletter.
At least five bar owners in Grenoble, France have been arrested for providing WiFi at their businesses without keeping logs.