Hidden Hotel Room Fee's

I was just online checking out hotel rates in Las Vegas and one thing that really irritates me is that all of the hotels list rates that do not include their mandatory hotel fee's.  If these fee's are mandatory WTF don't they just include them as part of the price they are charging?  Why the need for the deception?  Being charged for items I never use is bad enough but it also seems criminal that many places wait until check in to spring these added costs onto you.  Even worse, the Caesars/Harrah's properties are now charging these fee's too, there is pretty much now no escaping them when visiting Las Vegas.  I think we are long past due for the FTC to take a harder line against this deceptive practice.