A few years ago, I rented from Thrifty in Seattle (off-airport). They charged the following fees on top of the required taxes: vehicle licensing fee, concession recovery fee (11.1%), facility use fee, frequent flyer fee. Whether companies are on or off airport, they all seem to charge "concession recovery" and "facility use" fees. The "energy recovery fee" is becoming more and more common, too.

This fee craziness has spilled over into other businesses. A local, upscale cinema charges an extra fee to cover the cost of having cash registers to collect the cost of the admission ticket and fee!