Apart form the minumum hight rule (29), if flying at night in VMC while only holding a night qualification (no IMC rating or IR), could ATC ask you to follow any other rules associated with instrument flying or IFR?
Is a flight plan required for flight at night so, among other things, the controllers would know you are only 'VFR' qualified?
I agree that it would be wise to stick to an MSA. Is it not difficult to keep 'in sight of the surface' at night while flying over sparsely populated areas?