Wow! What a situation you are in. I would probably be doing exactly as you are, bringing them to my yard until their humans got home. I had a little bit of sympathy for the owners until you pointed out a few things 1) they got rid of the weim for barking and 2) these dogs are kept outside all the time because they jump on the furniture and tear things up. I guess the owners never heard of training a dog. *sigh*

Giselle's idea is cute although I doubt it would change anything. I would try to talk with them about training and using a crate or gating them in the kitchen or some safe place while they aren't home. Being outside all the time just makes me . They probably won't follow through on any suggestions because they don't sound like the kind of people who should have the responsibility of caring for dogs. I guess if all else fails you could report them to Animal Control but I sure hope they wouldn't land in a kill shelter.