Maybe they could dump them on the lawn or use them for drums or something. It just blows my mind what people will steal if you give them the chance.
Have you been to a colonia lately? They need water bottles because they build homes where there is no running water ---- a company here had some barrels clearly labeled "Toxic Waste" (but in English) stolen and later it was found they were being used in colonias to hold water.
Where I live, they'll steal anything that isn't bolted down. I've seen them breaking in, or attempting to break in, to cars in broad daylight, and they are absolutely brazen about it. They don't even do it sneakily or nervously, they do it absolutely openly and with defiance, no fear at all. One of my neighbors (an Hispanic gentleman, here legally,) has bought a pit bull because his window faces the street and he's had so many break-ins.
Heads up, folks! Soon to come to a neighborhood near you!