It isn't the trash haulers job to determine what is "good" and what is "junk." If they leave things at the curb, then the complaints will come, "... they didn't take everything I put out for the trash."
A couple of years ago, a sign appeared on several power poles on a street in the neighborhoods I regularly work. The sign was asking the whereabouts of a nearly-new Honda mower. I inquired at the house, as was told this story. A high-school boy cuts lawns after school. He put his Honda mower down by the street for his father to haul to a property he was intending to mow after school. His father had not yet picked up the mower before the trash haulers came along. Yes, the Honda mower went into the trash truck. The kid had parked the mower near the street, near to where the trash barrels were normally positioned for weekly pickup. The timing between his father's intended pickup and transport of the mower, and the trash haulers coming along the street was inopportune. Seeing hand mowers at the street for trash pickup is not an unusual sighting. The haulers did their job -- put all the items at the street into the trash truck. The young man's Honda mower was gone!
I would not be surprised the trash haulers put the trimmer in their truck. They were just doing their job. As for one of them having a "new" trimmer, I doubt it. They have a set route, and are nearly on the run every time I see them. I know the man who covers our area -- he has some of my business cards, and has gotten me business. He says he regularly takes two 25 ton loads to the dump every day. He has no time to make assessments about items left at the curb. His only focus is to get all those items in his truck, move on to the next stop, repeat, ... repeat, ... all day long. It is a tough job.
I would be very surprised if any recompense is coming from a trip to their office. They have little sympathy for complaints.