Is it legal to smoke in an aircraft there f_a? It is ILlegal to smoke ANYWHERE onboard an aircraft in many countries now.
Aside from the health reasons mentioned previously (along with the liability of the company, the responsibility of which is entrusted to the Captain of each flight, and who therefore may possibly be held PERSONALLY responsible at some future date for allowing this to happen), there is the STINK.
Smokers STINK...their breath, their clothes, their hair.
Perhaps a letter to the Chief Pilot stating that you`ve noticed some of the company`s aircraft flight decks have a strong stink of tobacco and need deodorising, might do the trick!
Inconsiderate @ssholes!