[soligern]

I mean you could just follow someone else out. Alternatively leave, stand outside to badge in and then never enter.

[taeric]

Both of those would be trivial to see on the data, though?

I have no doubt these things can and will be gamed by more than a few folks. But I also have no doubt it would be rather easy to figure out most of them.

[fnordpiglet]

The second one was controlled for by monitoring if you logged in.