I took a toothbrush into DL once. In fact I had a little kit including toothpaste, floss, etc. I was wearing Invisalign at the time and had to brush my teeth after eating and before putting them back in. The bag checker didn't say a word, nor should they.
I once had to report a bus driver at WDW. He was incredibly rude to a guest who asked a simple question. He went as far as to tell the guest to shut up and get off his bus! I heard the whole exchange and the guest's question definitely was not out of line. He was simply trying to understand the rules for his mom who was on an ECV. I was so shocked at the driver's behavior that I knew I had to say something. I wrote a detailed email to guest services. I received a phone message back, thanking me for my email and assuring me that the matter would be investigated. The caller mentioned that they would determine whether the employee needed to be reprimanded or retrained. I think in these cases, it's best to report exactly what you see and hear.