I think it depends on how the interactions have actually gone to determine who's unreasonable. An example - my favorite LBS owner is a decent friend of mine. He is a love him or hate him type of guy, and he knows it. So, his dealings with customers are either considered great or abrasive. I know people who either won't go to another shop or won't step foot into his shop. He doesn't care. In fact, he has asked people to leave if he thinks they're more of a pain than they're worth.

Personally, I often hope that the LBS doesn't stock something - gives me an excuse to buy cheaper online. However, I have seen him go ahead and order something that I asked about, eventhough I had offered no intention to buy.

Also, I don't know that I get too bent out of shape over someone's recommendation, especially over something like a tire that I can replace easily. I've had my friend make suggestions that went against things I read online; usually I do a little research before getting anything. In any case, I wouldn't bother to ask for a second recommendation for a tire if I wasn't too happy with his first one.