Please change your passwords if you have such a notice. Be sure to log into the forum directly vs. following a link in an email to avoid any phishing links. So far I've not had any notices of compromises and we've not had to clean up any issues. We keep up on the security updates and we have a good hosting service. At the same time, the vBulletin software that runs this forum is old, and perhaps less secure than other platforms, and financially it doesn't make sense to switch to newer forum software services as those cost thousands for a service (forums) that's declining in use year over year.
If anything big happens we'll make the necessary changes, including fundamental changes to our OS, and I'll keep an eye out for any abnormal activity, like Gunner45 posting or Bigunit crossing cattle guards without getting high centered.
