When QR codes are, except in jest, referenced in the future at an event I'm attending, I will in future calmly put my worldly goods into my bag, get my coat and make silently, but with haste for the nearest exit. It will, naturally, be a marketing event so perhaps I should be more wary of the content of said events before I join.
QR Codes, SEO, & Marketing Reactions:

I adored your wonderful post. great contribution. I hope you produce many. I will continue watching
TYVM, look forward to your continued support!