I did a bit of research and found you could cookie stuff an image in BBCode and even hide the obvious sign of you doing it that is the red X for the missing image.
The below code seems to work:
Now you have even less chance of being found out as the forum admins would have to look at the source code
The below code seems to work:
Code:
[bbcode img tag]http://www.yourdomain.com/image.jpg" onerror="this.parentNode.removeChild(this)[/bbcode img tag]Now you have even less chance of being found out as the forum admins would have to look at the source code