So, you're complaining that the amounts the government doesn't require to be included in the price are not included in the price. The taxes are the "certain exceptions" noted in paragraph 2. The ad discloses that these charges are additional.

Furthermore, your comment that the taxes are more than sales tax is misguided. Are you implying that it would be acceptable not to disclose taxes if they were less than the amount of sales tax? Surely not. And you're simply wrong in saying "taxes charged by airlines." The airlines do not charge the taxes--they are imposed by the goverments and airports, as noted in the second paragraph of your DOT document. Richard noted already the extent of these charges, but he missed the fact that the ad does link directly to a listing of the fees, as guided by the DOT document.

Bag fees are a red herring. You're complaining that optional fees, such as an overhead carry-on (yes, it is optional, as you can stow a bag under your seat at no charge or travel without luggage, both of which I regularly do), also not required to be included in the price, aren't included in the price. If I go into McDonald's and order a cheeseburger, it doesn't come with a free drink. When I go to a movie, it doesn't come with free popcorn. A new car has options, cable service has options, pizzas can have toppings. Virtually everything you buy has options. You don't need to bring a bag along to take advantage of the primary product--a flight. If you want one, that's a choice. If you don't like the business model, then decide with your wallet.

This ad meets the governmental requirement as it discloses in the ad that there are additional taxes and fees, which are easily accessible by clicking the link that goes directly to the Terms and Conditions (one place, not three) describing the taxes at length. It's disingenuous to cite a regulation that is fully met by the ad you are complaining about. And my question still stands and is actually further illustrated by your response: why are airlines required to disclose all taxes and fees in an ad but very few other businesses are subject to similar requirements?

Full Disclosure once again: I am an airline employee. These views are my own and do not necessarily reflect those of my employer.