I put somewhat favorable. I have no problem with the actual practice, but there are aspects of it and certain mentalities that I don't enjoy. The best example is the one above about the Winter Toy Shop. I don't like things like that happening, but at the same time it is allowed by the rules. I think a lot of the problems (real or imagined) would be eliiminated (or brought under control) by either reducing "promo" type sets or by putting some type of control on how many can be purchased. If this doesn't happen, there will always be people that clean out a store here and there. Unfortunately, unless either TLG or the stores put some type of controls in place, the people who do that aren't breaking any rules doing that. Personally I don't like that practice and I wouldn't do it on a huge scale. I would like to believe I wouldn't do it on a small scale (if there were 3 to a store for instance) but I would honestly have to weight my options at the time. The only sets I have bought more than 10 of were for me.
I think the promos are where the problems really show up. With regular sets it's near impossible to have a serious effect on inventory in anything but a small, local area. Using the chrome stormtrooper as an example, it was only meant to last a week and there were mixed signals on if it was supposed to be sold by itself or not. This was a recipe for people to get left out and feel bad about it. I understand people disliking resellers, but I think most of the time the feelings are misplaced because the resellers are only able to have real effect when there is an intentionally limited supply (which they don't cause). When a set is clearanced, or at the end of it's production run, then I think it's every man for himself because everyone has had the rest of the normal production run to get it. The Black Friday sale gives me mixed feelings. I think most of the high end items on sale that day have limits in place (I think). The low end items are understood to be first come, first served. I've been in stores 15 minutes after they opened and they are out of what I am after. So, while I wouldn't buy the whole lot (but I would buy more than one if I thought I could sell it, to be honest) I'm not sure if I can really be upset at someone who does since it amounts to an advertised clearance sale.
Honestly, I get most of the sets I buy to resell (or to part out and sell) during the buy 2 get 1 free sales and I usually stock up quite a bit. If I clear out a store of certain sets it is because they had limited amounts by the time I get there. As a tip to anyone else, watch for the KMart sale if you want to get Star Wars sets using this sale because they don't exclude Star Wars.
Tl;Dr i approve of the practice but I have a few reservations about certain aspects of it (though I see no easy way to change it). My main problem is people that clear out large inventories in one go.
Peace is a lie, there is only passion. Through passion, I gain strength. Through strength, I gain power. Through power, I gain victory. Through victory, my chains are broken. The Force shall free me.
-The Sith Code