It's certainly nice that little baby discs are there to protect us from scheming double-marking sons-of-mothers. Where do people come up with this hogwash? If anyone wanted to steal a few inches here or there it could be easily done, with or without a marker. Whooooo cares?
I've never once used a mini marker and never will. Happily, everyone I've ever played pdga events with has been grown enough to understand that this is an inconsequential and entirely ignorable rule.
Ignoring rules you don't like is not ever okay. And the person you quoted is the PDGA's Illinois State coordinator, so show a little respect.
I can assure you that if you were on my card and not marking with a mini we'd have a problem.