This should make you feel better, Florinda - here's a short list of things I've tossed:
A replacement credit card for one I lost - tossed the envelope without opening, thought it was just junk mail.
Receipt for a $300 piece of furniture that ended up not fitting into our apt.
A part from a blender. No, not an accessory, a part necessary to make it work - thus requiring a new blender.
I try to be more careful, but as you say, during times of aggressive clutter-policing, it's dangerous