I don't mind them, too much. Raccoons are clever, adaptable, and engaging mammals and they're darn good looking to boot. They do cause problems, perhaps especially with the raccoon-borne Raccoon Roundworm, which causes a disease that can be devastating to Allegheny Woodrats among other organisms. And a lot of people seem to hate coons just because of their very traits of intelligence and adaptability. If a family unit gets access to your attic, I suppose such a sentiment would be understandable. For me, the coons are strictly outdoors - the house seems tightly sealed and I've never had any issues with Raccoons or other mammals other than the rare White-footed Mouse getting in.