i think that many people fail to see that bay is a director that is hired to make money, and he's pretty good at doing that
Who isn't in Hollywood?
Ever since the 70s the film industry in Hollywood has been the most profitable American export around the world. If financiers are going to invest 200 million on a product/film, whoever is controlling that project has to make sure the investors get their money back, in double please! Its a business.
Transformers: Dark of the Moon topped Revenge of the Fallen by 50% in its opening week! So far, Dark of the Moon has made 160 million in just six days, US only! Now, I'm sure MB would have preferred to have a more friendly reaction from the film crowd, but his job first and foremost, was to make money, lots of it.
For sure, if all 15 year olds round the world watched Pressburger and Goddard, then Bayhem would be out of business, but so would Hollywood. But we know that's not what 15 year olds want to see, and I'm sure Pressburger wasn't making films for 15 year olds either.
Obviously, I would prefer if big money makers would be more like The Dark Knight or Avatar rather than Dark of the Moon, no questions about it. But these are nonetheless "events" and kids around the world just want to seat in the dark theater, eat popcorn and watch giant robots smack each other up! Personally, I see nothing wrong with that, as I don't see nothing wrong for anyone above that age to not like that.