I'll cast my two cents on this issue.
there's a diference between "coloquial" english and "formal" english. first let me say that I'm in an Advanced Placement English class, and enjoy, and one of my foremost hobbies is reading literature. if I was writing an esay or formal paper, I would use "formal" grammer, spelling, and syntax, however in everyday usage spelling and grammer mistakes are just fine, and actually often become commonly used enough to become "proper" I think we can all agree that this is a social, unformal forum, so why focus on good spelling and grammer as long as everyone can understand.
it's of course diferent when interacting with customers, as spelling mistakes look unprofesional.
as for the "looking at boxes of them every day" just because we look at something, or use something every day does not mean we pay attention to, or absorb it, i.e. who here, can tell me without looking, what markings a Carlon Non-Metallic old work box has?
dat jus' be my oh-so humble opin-e-on
-Will
