Recently active topics in Spongecell tagged with hacker

We are highly considering using your promote calendar for our Corporate site to publish Motorsports events. We have found one thing we feel is a vulnerability, and that is the email a friend feature. We would be afraid that a hacker could blast out 1000's of email that say they are from us that could have profanity, pornography, and number of things that would look horrible for our company.

So the question is, is there a way to disable this feature? Or.....is there something in place to keep hackers from blasting out emails from a published calendar on our website? Most likely for us to use it, this feature would have to be disabled.

Thanks,
Kris