Adobe and Apple and most companies actually leak their software to the public so the younger people and people who aren't going to pay for it can find it and use it and get to know it - then, when the few of them become filmmakers and have to pay for it because it gets documented and whatnot, they go to what they know - which would be the program they learned.
I hacked my copy of CS3. Just do what people have said and you'll be fine. The hardest part is usually getting the keygen because you're on your own for that, now you just have to follow the steps.
No I run a PC...
My neighbors mom is in advertising and has the whole Adobe suite though...maybe I could 'nab you a copy of AE from that, idk whether the CD is actually Mac/PC specific but hey.