Safety announcements may be important to leisure travellers who travel once or twice per year but to the regular traveller they are just a routine like buckling up before the take off. Most of us here probably know by heart the whole pre take-off saftey thing and could do the demonstrations ourselves if we really had to.

Taking a guy off the flight just because he wouldn't shut up during the lecture? Geeeeeee... there is a difference between having a conversation and air rage... This is not primary school after all where students have to shut up when teacher speaks. If this is allowed to go on then what's next? We won't be allowed to read papers and magazines when a FA talks?