I don't know why so many people are cavalier about this.
Proper capitalization is part of proper spelling [...]
My favorite example of this behavior is when copywriters, graphic designers, etc. are inconsistent regarding the capitalization of the name of their own organization. I can't count all the times I couldn't figure out how best to bookmark an organization's website because the copywriters, etc. referred to it as Organization, ORGANIZATION, OrganiZation, and Organi Zation.