Several flights have been diverted because of incendiary words scribbled on lavatory mirrors. It's not hard to disrupt commerce anymore.
But as to any news on the crash of Ethiopian flight 409 off the coast of Beirut, Lebanon, the last morsel of gossip came in March when a captured AQ in the Arabian Peninsula member claimed responsibility via underwear, without proof. There was no reaction in the US media aside from World Net Daily. And supposedly there was a preliminary report that came out of France blaming the pilot, but good luck finding that on the net.