If, on a mostly full bus, you have placed your backpack or bags on an empty seat beside you, OR if you are sitting in the aisle seat while the window seat is empty, I will make a point of asking for the seat you are blocking. I will do this even if there is another empty seat I could have taken instead, but not if the bus is largely empty.
However, if your jacket or bag happens to be covering the edge of the empty adjacent seat, I will probably choose another seat over that one, because I don't want to sit on your jacket or be squished against your groceries.
Kirsten Starcher lives in Vancouver, BC, spending half her time as a musician, playing bass in ARCTIC as well as solo, and the other half as a web designer/developer.
You can contact her at "kirsten at crowstoburnaby dot com" (turn it into a proper email address, of course!).