When I work together with a friend; I steer and he cannons or vice versa, I'd answer 'No', and I'd tell those requesters that we are trying to level up. When I just go plundering, then I might let them steer for a while if they ask nicely. I usually tell ppl below level 10 sailing that they don't need a war frigate to practice (they can get on other frigate or galleon public ships). I might change my mind when they tell me nicely that they had other master pirate(s). It did happen, and I'd be glad to help other experienced pirates level their baby pirates. For just plain 'ol "naggers" (especially the ones who spam you and use all caps), the answer is 'No', period.