I will be the first to agree that mobiles used in flight are not a good idea.
What aggravates me is why there is all this fuss about them being used while on the ground. Why shouldnt you be able to use them before takeoff, or after landing?
And certainly this cr@p about not using them when walking across the apron, is pure tosser-ville! Who stops the engineers and despatchers, refuellers, security etc usung radios on the apron?
No one!
I would suggest that if the rules were a bit more feasible/believable, you mind find a few more folks respecting them!