i am the only player at my local store who uses drop pods and my space wolf army is toting 7 of them at 1500pts!!!!
we had a check through the rules (shortly after 6th ed came out) and decided that the doors count as access, but they also count for scattering off the table (for mishaps), into terrain (for dangerous terrain), range (especially for meltas and such), etc. at tournaments (usually throne of skulls for me, sometimes store-vs-store invasions) i have always let my opponents do so as well
not a single complaint has come my way thus far.
much as it is a purely irrational concept, i cant stand other people touching/moving my models (their mere gaze could cause them harm, let alone
actually touching them

) so i am always uncomfortable with models clambering over my drop pods. it seems really petty, and i dont even bring it up if it happens..... i just dont like it. (i even have a few "destroyed" drop pods that i use to replace the ones that get wrecked

).