Vehemently disagree with this. When I start a new campaign, the invites include my 8 house rules of which 1 and 3 are appropriate to this thread.
House rule #1 is: I run "adventure paths". You must be willing to follow the campaign premise and plot.
House rule #3 is: I will provide guidelines on what kind of characters would be best suited and will provide a generic plot/outline of what to expect.
Well, then. You have a problem. You have created it for yourself by choosing to railroad your players.
Long story short:
(1) If you, as the GM, don't want the responsibility of catering to your players, then don't run a railroad. This allows the players to cater to themselves and you don't have to worry about it.
(2) If you, as the GM, want to railroad your players, then you have a responsibility to cater to them.
The third option is that you're railroading your players in order to prevent them from doing things they find fun and/or force them to do things they don't want to do. Why the hell would you want to do that?
So it is your opinion that if a DM runs adventure paths, he is railroading the players? That assumption on your part is so invalid that it is not worth my effort to attempt to change your mind, nor correct your 3 options that follow from the invalid assumption.
-- david
Papa.DRB