Those are not Bogus fees, they were instituted on November 18th. Hertz had no control on it, and certainly could not just not charge it, you would have been hit with those fees no matter who you rented from after the 19th.

The Northwest Arkansas Regional Airport Authority Board of Directors at its meeting Wednesday approved charging a $3.50 per day fee, for a maximum of three days, on vehicle rentals. The fee was $3 per rental vehicle contract, regardless of the number of contract days.

Those who rent vehicles at the airport paid the fee to pay off a car wash that vehicle rental companies use, said Scott Van Laningham, regional airport chief executive officer.

The airport will keep $10,000 per month from the new fee, Van Laningham said, and place the money in escrow to pay for future needs, including perhaps a parking deck.

The car wash operator will keep some of the fee to buy supplies, pay for water and operate the wash, Van Laningham said.

I'm guessing you had a two day rental, so they removed the standard $3 fee and added a $3.50 for each day fee as they were required to collect. While this story does not detail all the fees, it's quite possible they increased the concession fee too.

It took about 30 seconds in google to find the information.