i wouldn't risk it either. been coming here for 24 years, currently here for the past 2.5 years. there is no way i would ever mess with immigration here.
"After the e-Visa application has been approved, a confirmation e-mail will be sent to applicants, which can be printed out for presenting to airlines and Thai immigration officials when traveling to Thailand."
ahh typical westerners trying to fight. i don't make the rules nor am i immigration. he is going to have a hell of time explaining this to immigration. hopefully he gives an update.