I've been a huge fan of MTJ Publishing for about the last 6 years, and have purchased dozens and dozens of comics from them. My personal information has always remained perfectly safe. They never EVER give your info out to other people.
I even started to publish my own work through MTJ about three years ago (which involves even more personal info)...and it continues to be a completely safe site.
Jim has been involved in the tickling community for over a decade with MTJ, and they are ethical, honest, and very safe. IMHO.
All of the comics are digital, meaning they come through the internet. They are available through direct digital download, and come straight to your computer.
Give me a shout if you have any other questions, but yeah....MTJ is very very extremely safe.
^^
B