ShinHakkaider
Adventurer
These arguements hurt my head... So I will say, in my campaign a pre-published AP is not a railroad unless the DM runs it like one.
Absolutely.
If you are incapable of running a published adventure without making it seem like a railroad? Then that goes to the DM's skill or lack therof. There are a few cases where it's the fault of a poorly written mod, but for the most part it's totally possible to run something like Curse of the Crimson throne (which I'm running right now) and have it be enjoyable and fun.
Especially if your clear with your players at the outset that youre running something like that. Saying that AP's = Railroads = Bad is just another way of saying we're doing it wrong and it's badwrong fun.