I'm happy to report that here in Spain (at least in Mallorca), the doggy poop reminders are located all over the place, just as they are in Amsterdam. I did notice quite a few dog owners doing the right thing, but there was still an unfortunate amount of forgotten poop left on the streets, the sidewalks, steps, next to trees, etc. A few well-timed yelps prevented anyone in my party from suffering the stinky consequences. This time, we were lucky.
And the effort continues - apparently all over Europe - to teach humans to clean up after the beasts they choose to call pets. May the struggle continue, so one day we can all live without the threat of smelly shoes.