Passengers who don't understand the LCC business model should stick to full service carriers.
Well actually....
Whilst I would normally agree with you on that, in this case the LCC's broke the law. It's illegal for them to make an offer of a product for a price, and then say "oh, by the way, here are some non-mandatory things you need to pay for as well to actually take up the offer."
If I was to offer you a flight from SYD airport to MEL airport for $50, I have to make sure that you can actually fly from SYD-MEL for $50, and not one cent more. I am more than welcome to charge you for meals / drinks / baggage / aka the things you get for free on full service carriers provided I did not actually state that the $50 flights was all inclusive.
What I am not allowed to do is offer you flights for $50, and then say "oh, that didn't include 'taxes'" or any of the other BS extra's which are really just part of getting a plane from A to B and are in no way optional.
Interesting thought - let me see - quick call to Airbus - please Sir can I have a 380? Sure can - but you do understand that our standard price can and does vary depending on your personal corporate requirements. Would you like all Y seating or would you like to option up with a bunch of J and a small premium F section up front? Showers or no showers? Bar or no bar?
What you are talking about is the base model, vs the fully kitted out version. If Airbus offered you an A380 for $350 million, provided they made it clear that it was for the aircraft alone, and that you would be responsible for the seats / galley's / other fitout in their advertisements, provided that you could write a cheque for $350 million and fly away in an A380 then there is no problems.
This is no different than when car dealers got themselves into a world of hurt by advertising a price for a car, and then adding on "dealer delivery" as a non-optional extra cost. These days you can get into the base model car for the advertised price, and if you want the extra features which don't come as standard (even if you see every other car having them) then provided they made it clear up front what is and is not included in the base price then they are in the clear.