If you haven’t signed into Yahoo in the past 12 months, the tech giant wants you back and it’s using some tough love to get you. Yahoo has set 11:59 p.m. PT on July 14, 2013 as the deadline for users to sign into the site or their Yahoo mail. Those who don’t will lose their Yahoo IDs, and the usernames will be put for grabs so others can try to claim them. How many Yahoo IDs are we talking about? Dylan Casey, Yahoo’s senior director of Consumer Platforms, wouldn’t specify other than to say “a lot.” “You can imagine how many accounts are created every day, and some percentage of those just become dormant after awhile, and we’re actually pretty excited about the names we’re going to make available to people, ” Casey explained. While the use-it-or-lose-it policy may be great for some, it’s raising some serious privacy and security concerns since e-mail addresses are linked to log-ins and password recovery on other sites.