Are Duster rear bumper corner brackets important?

My thoughts are a little more "Toe the Line".
The car factories, especially Ma Mopar, did not exactly have a reputation for putting a lot of unnecessary superfluous parts on their cars- the bean counters would have a hissy fit. Every part had to have a purpose and justify the expense of adding it to the assembly line, so it's there for a reason- and probably a darn good one.
Will it cause a catastrophic failure if they're not there? Probably not, but...
Use 'em if you've got 'em.