Yeah, they're wrong. Offering polite suggestions is one thing, demanding volunteers do things in some specific way is entirely another.
Do it the way you want to do it. Unless someone is paying you or you want their specific help with something going forward, I don't see any obligation on your part to listen to demands.
Do it the way you want to do it. Unless someone is paying you or you want their specific help with something going forward, I don't see any obligation on your part to listen to demands.