Surely one of the by-laws or part of the relevant state legislation is that all owners must be able to have reasonable use and enjoyment of the common property (or words to that effect). If you are denied access to the BBQ (common property) then that also is a breach of the by-laws. Surely the two cancel?! If you are still up carousing at 3 AM and keeping everyone awake, then you would have breached a valid by-law.