I think...
A lot of people like the feeling of being oh so "righteous". And they get that feeling from finding some sort of a cause; so when one pops up, like the Starbucks thing, people hop on the bandwagon and get all riled up over things that, ultimately, don't really matter. I mean, there are people who really do feel strongly one way or another about a topic, and there's nothing wrong with standing up for your beliefs- when you really believe in something; not just because you want some kind of crusade to make yourself look good.
(I should have used that on my thread! Drat!)
But no, I don't find it to be a very Christ-like attitude to basically ignore a business into shutting down (unless what they were doing was actually something worth standing against).
The town I live in put an entire family out on the streets and ran them off simply by boycotting their business, and the reason for it? The owner of the business stated openly that he didn't like "church people". He explained that he had often felt belittled by several members of the community who regularly attend the small church here.
A few people took it to mean he hated Christians, they spread the word, and even though the man ran the only business of its kind for 30 miles (restaurant), all of the locals stopped going there, and within a couple of months, he was out of business and scrambling to find a place for his family to live.
Yeah, the guy messed up by saying that kind of thing, but then, so did everybody else by treating him that way.