Hate to break this to you, but anything hanging on a banister counts as "in reach" if the dog can reach any part of it to pull it down. Your dogs must have figured out the rule about "anything in a pocket that we can reach is obviously a toy for us."
This is in "Doggie Handbook," rule number one, I do believe. My dogs seem to have read that handbook front to back; they are always coming up with new "dog rules" that I was not previously aware of!
Like: if Mom or Dad are in the kitchen, doggie treats should be dispensed asap, even if Mom or Dad seem to be thinking about something else.
If no one is occupying one side of the bed, that automatically means that Dogs Are Allowed, even if dogs in theory are not allowed on the bed.
If anything is on the counter and reachable by nose when a certain dog is standing on his hind legs and reaching his nose over the counter as far as possible, then it must count as "treat for the dog," even if it looks amazingly like a sandwich prepared for people.
There are other rules they are figuring out; I am doing my best to stay one step ahead of them, not always succeeding.