John Simpson of Consumer Watchdog raised concerns about how users’ personal data is collected, stored and shared. He’s worried about "up-until-now separate databases being merged and
used in ways that haven’t been made explicit." Simpson hopes to see
Microsoft and Yahoo come up with a data retention policy that expunges
personal information in about a month and says that, by default, they
shouldn’t collect behavioral information unless consumers opt-in.
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Long Term, The Microsoft-Yahoo Deal Could Benefit Consumers