Guests report getting billed hundreds of dollars for smoking, based on the readings of an "algorithmic" smoke detector. The sensor manufacturer markets its product as a way for hotels to unlock new revenue streams.

See also: https://www.wsbtv.com/news/local/cobb-county/marietta-hotel-fined-women-hundreds-smoking-they-say-other-activities-tripped-sensors/WPFWFT7INFGOLHR4HSQK7YIOKY/