Acen I don't know if they are. No one actually reported this but we received one. They could also get email addresses from alternative download sources, other websites linking to us, fake websites or similar content websites.
It's extremely likely you too used the email address for your SLR account on other related websites. We do everything we can to prevent this, like your SLR account, forum account and payment accounts are not linked and can all have a different email and username.. Which isn't the case everywhere.