I thought we had it on if you mean the random letters and numbers people had to copy when they registered, but I'll check with my webmaster. How does having it on or off make a difference?

I didn't understand what do you mean in full, but if you mean Captcha, it's an optional feature to miniBB. The software could be configured to be protected even without it; but this module slightly make the life easier, because it stops automated spam which comes from other programs and robots; they can't recognize it and substitute these numbers easily, and that solves the "human detection" problem, because on forums you mostly want all users to be humans, right? ;-)

Maybe he meant a way to track people who copy and paste template emails, passwords, etc. when registering. Alternatively not a bad idea

I suppose now, the question was about a random password generator, which also shows the password strength. It's now often met on registration forms.

Well, it's really good idea overall, and I'll think about it as an add-on. Perhaps there are already many javascript-based modules available for this purpose, and which could be easily attached to miniBB.