One of the worst behaviors by internet companies is to collect phone numbers in order to facilitate selling and integration of private information while pretending it is somehow a security issue. Though security experts all say using phone numbers for security adds security risks instead of using much more secure methods such as a security key. Companies that use deceptive security methods to collect phone numbers in order to sell the private information of their users make it very hard to trust what else they are doing.
Twitter has long claimed a security reason to collect phone numbers [Twitter faces $250 million fine from the US FCC for these practices abusing the private information of users].
continue reading: Privacy Invasion as a Business Plan
