As mentioned by Damien above, this isn't by any means the first missile vs airliner attack.
It has been taken seriously for a long time by, for instance the Saudi Royal family, who had ECM on their SP Jumbo years back, already.
The rest of the industry needs to wake up and realise that we are very much at war - just as in the old sailing clipper days, where civilian ships had to be armed.
It's getting on for open season again and with the money and weapons available to these goons - and the spotter positions (even with a mobile restaurant at ZRH - 3/4Mile final) - it is just a matter of time.