I have a basic design question about views.

I've been placing multiple tables in one view where more than one of these tables is being updated by the view. I've been told that it's not a good idea to be updating more than one table in a view at a time. I had assumed that doing so whould acutally be better and more stable (as I only have to issue one tableudpate() command instead of 2 or 3) - but like I said now I'm hearing otherwise. Anyone have any thoughts on this?
Thanks!