Without physical evidence of the missing Malaysian 777 plane, all theories on its disappearance are all speculations

It is more fun criticizing

From Belfast Telegraph

 
 Malaysian Prime Minister Razak announces MH 370 flight ended in South Indian Ocean at press conference


Many theories are being advanced on the mysterious disappearance of Malaysian Airlines MH 370 that has been missing for 3 weeks.  Some claim terrorist, mechanical failure, or high tech RF hijacking, manufacturer (Boeing) failure, or weather.  Some Chinese insurance companies have started compensating families of the Chinese passengers/victims.