Mbbored, I agree with those who say to disconnect the doorbell. You might be able to do this by pulling a fuse or circuit breaker, depending on how your home is wired.
Perhaps you should think about getting an inexpensive cam to video your entrance. If this horrid woman is thwarted when the doorbell doesn't work, she may pound on the door or blow a whistle or some other action to tease your poor dog and get him to bark.
I do agree with PP who think that the dog's barking is the motivation for ringing the doorbell. My grandkids think the dogs are hilarious when the UPS guy or the post man come.
I too would be leery about reporting the 8 people right away. They may be crazies who would retaliate. If you do report them perhaps you should wait several months.
SS stuff - I saw a father racing his little daughter around Wegman's recently. He was pushing the cart and *running as fast as he could,* and the child was shouting with laughter. The store wasn't crowded, but this is still scary dangerous for both his daughter and others.
I couldn't find an employee to report this, and was in too much of a hurry to walk way up front to the office. The noise, which could be heard aisles away, finally stopped, so maybe he did meet up with an employee. At least I didn't hear a loud crash.
I've started putting the store phone number on the top of my list, so that I can call the front desk if by any chance I encounter anyone like this again.