I'd stop buying if all that was available was p&s, yes. I can't even watch p&s:ed movies on TV anymore... just sit there pissed noticing how they've brutalized the presentation. I certainly wouldn't pay good money for discs treated that way.
Fortunately it's highly hypothetical.
If a movie is not in it's proper aspect ratio, or at least close to it's correct ratio. I will not buy, plain and simple.
There is only one widescreen movie I have seen in all of my years that I actually prefer in full-frame and that is The Abyss which to me appears to have better framing than the 2.35 version, That said I still feel that the Widescreen version must come first and foremost as that is the proper presentation regardless of my preferance.
Before DVD I bought widescreen VHS whenever possible but if I couldn't get it widescreen then I would buy P&S. If the studios adopted the policy now of only releasing P&S, I would probably wait for awhile hoping for an SE. But if that's all there ever would be then I would probably buy them. I still watch P&S movies on the movie channels so I guess I'm not as die-hard as some here.
I'm with most folks here. I wouldn't boycott any studio, per se, but I would still not buy anything that is in pan & scan. If they threw us a bone every now and then with an OAR version, then I would pick it up without hesitation.
Still, there are plenty of older films that are in 1.33 and 1.37 originally, so I would just go classics shopping from then on. If they cropped them to 16X9, then Id avoid those too.
I'd quit buying them domestically, but for really important new releases I'd look to Canada or other Regions and if they had the Widescreen, that's who would get my money.
If all proper Regions went p&s, I'd buy bootlegs off eBay.
I will never buy a movie on DVD that's not OAR again.
I don't buy P&S DVDs now, and if that was all that was available, I still wouldn't buy them.
My collection would become very narrowly focused on old movies that didn't suffer from pan-and-scanning.
Jan