[mtmail]

Happens to me regularly, especially when I take photos of shop names, opening hour or draw building outlines (on an existing OSM map printout). The more residential the area the more questions. Of the last five questions two knew what OpenStreetMap is so that's progress.

[roptat]

I usually carry a few stickers on me just in case, so people can remember OSM and look it up later (after I explain what I'm doing and say it's a fun community project).