99% of consumers have the place they buy it from install it. They do make it known in the paperwork and on their website, it's just a matter of if you look for it or not.
My shop doesn't accommodate people at all who aren't nice. If you can't be nice, we won't deal with you. In fact, when people yell at us over the phone, we tell them to stop or we're going to hang up. If they yell at us in person, we tell them to stop or we're going to have them escorted out by police and asked never to come back. We don't get paid enough to deal with douchebags.
If you had come to my shop with an attitude, we'd have sent you packing, and not let you return the product since it was opened. We really don't like it when people have attitudes with us. You can't treat us with respect, well then **** you.