Because it sounds like this could be tied to your mobile device, which means it uses the account you've conveniently provided in your OS profile, which would make this difficult...
I do, but I wouldn't want to pollute it with silly carrot-and-stick-derived check-ins. I'd probably just de-link my FB account on my phone and use the dummy account, then re-link later, depending on how hard up I was for internet access and the expected wait time.
Most people will just click "accept" without reading anything and status feeds will be flooded with check-ins.
Because it sounds like this could be tied to your mobile device, which means it uses the account you've conveniently provided in your OS profile, which would make this difficult...