I used Booking.com to make reservations at a hotel. Thirty minutes later, I received a sales call from some resort. Twelve hours later, I looked at my gmail account and there were literally hundreds of unsolicited emails from vendors trying to sell me something or get me to sign up for something. Then my cellular provider sent me an order confirmation for a $750 iphone that I did not order, Sears Credit Card sent me my online statement (I do not have a credit card with Sears). I have never had these problems before. I ended up having to change all my passwords, set up extra security measures and filed a fraud alert on my credit report.