I have a very small stash, mainly real bargains I couldn't pass up and most of it is juvenile so I can always use it for baby quilts for friends and neighbors or the NICU. My limited space also restricts me from having a large stash.
A woman I worked with had so much fabric she didn't even know what she had. She just bought and bought whatever she liked and of course, it never got used. To me that is a waste of money.
I have no problem with other people's stash. Just my own opinion.