Yes, of course - If you want to try it, try it.
If you dig it, no harm done.
I still highly recommend the book though - It's ****ing fantastic.
*edit*
I must say though, that the reason the show should have followed the book is because the great thing about the book were the characters, and what made them interesting was clearly expunged from the show for politically correct reasons (don't want to give anything away).
The plot itself could totally be modified to suit a TV program - That's okay - But to change the essence of what made the book tick?