The irony of this is that people are more concerned with her presence or absence than they are about the Autobots and Decepticons themselves. And if they should get more screen time. The movie is called "TRANSFORMERS", not "Let's Drool Over Megan Fox". That's like caring if Rachel Dawes, a non-canon useless character died in the Batman movies or not. Why are people worried about a good looking chick in a TRANSFORMERS movie? They're on the internet. Anyone even remotely complaining about this could see her anyone second. Google her up and you'll see tons of pictures and you won't waste five dollars.
It's not like these people will meet her in person. They'll only see her on screen anyway, so if she is a piece of media, visual media, that you can only interact with by viewing, then why get mad when her only attribute is beauty, which is easily replaceable in Hollywood? People are actually saying they won't see this movie if she isn't in it? Are you kidding me? Having her not in the movie is like having her IN the movie: no difference at all!
I mean look at this
http://www.facebook.com/pages/We-Wont-See-Transformers-3-Unless-Megan-Fox-Is-In-It/118712224836173?ref=ts
And they're more of these too. It's pathetic.