I suppose at schools that don't teach English well, those 'many' could argue anything that's not correct as being correct. I was taught in Catholic school, and there we learned that other schools had lower standards.

Shall we lower our standards so we all speak more grunt-like? Is this where we are headed?

"But it's quite useful (and aesthetically pleasing, at least to us), and careful users of English should do their part to preserve it." http://grammarist.com/grammar/subjunctive-mood/