Their predatory business practice killed a lot of local cafes. Places that were funky, cool, focused on their product and had a loyal base of locals but were kept afloat by tourists and other passersby who wouldn't cross a street, or just fell for brand recognition. They'd set up shop across the street or around the corner, and operate at a loss until they drove the locals off.

I'm loathe to admit that starbucks quality has gone up a bit lately, but even today their standard pull is burnt to hell in the name of homogeneity. So yeah, they dealt a huge blow to Seattle's (and many other cities) local cafes, and replaced them with a sanitized lack of culture.