I think that one of the biggest obstacles is when a department or program doesn't have all of the instructors on the same page. If there are instructors who don't take the time to grade or remove points for spelling and grammar, then the instructors that do end up looking "picky" instead of the norm. The fact that students complain about getting their work actually read and graded is really frustrating. But if every instructor did it, it would be the norm, and they might not think its something even worth complaining about because it's just standard throughout their courses.