So what can be tweeted from a toilet? There's the flush, but that's been done before
and it only tells you that someone went to the loo. Big whup.
The other information that we can get is from the toilet paper usage. Available data from here is the # of times it was used in a session and the total # of squares used in a session. From this we can get a pretty good idea of what happened.
All right, so how to get the data? Magnets, baby.