What are the disadvantages of a B&B?

Could you elaborate on the downsides of Bed and Breakfast accommodations? I'm particularly interested in hearing about any potential privacy concerns, limited amenities, or the possibility of disturbances from other guests. Additionally, I'd like to understand if there are any common issues with noise levels, especially if the property is situated in a busy area. Furthermore, could you discuss any potential inconveniences that may arise from sharing facilities like bathrooms or kitchens? Lastly, I'm also curious to know if there are any hidden costs or fees that guests might encounter during their stay. Thank you for addressing these concerns.