So question if you don't like filters, and only use them in dusty environments why bother to post? Also smacking salespeople is not nice <vbg>.
The reason I use B+W has nothing to do with cleaning or any of that other crap. I use them because they are consistant in their color from filter to filter. Many of us here use L lenses, and I demand color consistancy from image to image. If I use a WA L for one image and a 200 2.8L on the next few frames I do not want to see a color shift that will have to fixed in post. I used to do a boatload of catalog work, and teal needs to be teal. The color contrast and reflectance need to be as close as they can. It is just that simple. If Hoya or Tiffen, or any other maker had that as a quality control guideline then I would use them.
I do not know how much color or B&W darkroom you have done, me way too much. Color variences are a PITA. Nuff said.
Les, your first question is nonesense ... really 
If I do use a filter I want it to do as good a job as anyone else.
Simple fact is for the huge majority here or within the wider photo community all your 'old time' darkroom stuff is irrelevant. I have done ZERO darkroom and have ZERO interest in it and it is truly irrelevant to this discussion, except perhaps for a very small minority.
Next, if you have not used top-line Hoya's you don't know if they are consistent or not. End of story. You just have an uninformed opinion about it. You talk a lot about you used to do this and used to do that and you used to sell to big wig companies and 'some of us here' use L's and demand X and Y and all that 'credibility blah, blah' stuff, but reality is you ain't used what you critique so it's all hollow AFAIC ... you would have more credibility in this discussion if you based your opinions on objective use of current product. And you really believe that a successful multi-national company like Hoya doesn't have QC on its filters? Can you prove that is the case please.
Anyway, I am not interested in convincing people to do X or Y or buy X over Y and not at all interested in convincing you of anything. I like to think I am open minded, listen to those with experience and ultimately like to base what I say on my own subjective experience with stuff. That's what I have tried to do here. All I can say is that, currently owning both brands, the top line Hoya and B+W's that I have give the same results across samples. I have never noticed if the Hoya and B+W have a different colour cast across each other. If I get time I will do a test and if the B+W give better results or seem more consistent across samples then I will bow down before you, because I am as interested as most here in getting the best results.
Ok, end of discussion here for me ... people make your own minds up. But if you want the B+W then they are much cheaper at hvstar.net and so the choice may not be too painful on ya wallet 
