acceptibility tab as bluetooth and cell broadcast recieving capibilities can be turned off on users devices it can be argued that if users have these systems on they are requesting localised information including proximity marketing tab tab some go further claiming that there is triple opt in with bluetooth systems tab firstly the consumer must stand in an appriopriate 'zone' tab secondly they must make their bluetooth handset visible to other devices tab thirdly they must accept the transmission tab in the event a consumer accidentally opts in they simply click 'no' to deny the transmission and those sending the messages opts them out of the campaign removed from the article as npov could go back in if it was rephrased to be balanced with any evidence that people find it spammy if there's proof people don't find it spammy we'd need to link to some original research i suppose