Common sense apparently needs to be renamed - because it seems to be not nearly as common as it should/used to be.
None of those seem like valid reasons.
"Don't know": whether it's not knowing a rule exists (and even if it's not on the website as
Disneyland does, it's on park maps and attraction signage) or not knowing how to operate your camera or that its ideal flash range is six to ten feet, or that using flash in a dark ride
negates the effect you were trying to capture - isn't a valid excuse.
Neither is being selfish, which is what "don't care" surely implies.
And, "oops, I forgot" may work for the first picture. May.