Photo stealing in classified ads

This is probably a petty topic but I'm just curious if anyone else has had people steal photos from their posted classified ads.

A couple months ago, a photo from one of my Craigslist ads was stolen and used with an ad for hay from a producer in IA.  Today, I just found another photo that was stolen from one of our videos on YouTube. That ad was on a regional 'hay for sale' page on Facebook. I thought the picture looked a bit grainy and also that it looked like the inside of our barn and our hay and equipment. Sure enough, it was. This was supposedly big squares for sale from someone in MN. The funny thing is that the hay pictured isn't big squares but actually small squares in 21 bale bundles. Its rather annoying and I know I could watermark everything but that is time-consuming. The boss says not to worry about it. I contacted the person selling hay in IA about using our photo and they replied rather indignantly that they doubted there was a copyright on the photo and that they were sold out of hay for the year but that they planned on using the same photo next season! I spend a lot of time marketing the hay for the company and taking photos. Its frustrating to have people take the easy route and steal photos to try and market their hay. I guess its all on the buyer, especially when they come to that producer's barn and find that it doesn't look anything like what is portrayed in the photos. I guess I'm old-school and try to be as honest and ethical as I can when I deal with my buyers.  I try to take lots of photos throughout the season and refresh my ads and the website periodically with them. I imagine this is a common problem and the old adage, "Buyer Beware" applies even in the hay business.

Okay, I'm done. End of rant.

Photo stealing in classified ads