OK; a couple of points. Has it said anywhere what the level of smoke was? A mere whiff of exhaust, or a complete filling of the cabin with smoke?
Secondly, let's get off this mutual slagging between the passengers and the crew. It's been suggested that pax are so accustomed to airline staff being deceitful and untrustworthy, so why trust the PA? How about "Ladies and gentlemen, your captain. Your attention please..."?