Would anyone else consider this?

Sometimes I wonder if I just think differently than most people. About 15 minutes ago, I was out to get some gas and deposit a couple of cheques, and while at the ATM, I noticed that only one of the cheques was endorsed.

What do I do?

I go across the street to a Chinese food place that's open late, walk in, grab the pen beside the cash register that they use for taking phone orders (I've been to this place many times over the years), and endorse the cheque. A very confused man watched me do this from inside the restaurant, but seemed oddly okay with my explanation.

I see absolutely nothing odd about what I did, but somehow I don't see most people considering this, much less doing it. Am I giving the average person too much (or too little) credit?

Or, to reiterate.... would anyone else consider this?