What an idiotic remark.
My dad was a blue collar worker, and I'm quite capable of writing grammatically.
My apologies to you and your father. There was a time when an 8th grade education was comprehensive. Today's under twenty somethings are nowhere in that league. The knock was intended for the "younger generation" not the socioeconometric status of blue collar workers.
My father was a immigrant and worked in a factory as a maintenance man for 20 years. He painted beautiful watercolors of flowers and nature scenes.
Regards,
GtG