Failure of LIGO physicists to provide a spacetime diagram showing the simultaneous laser paths and gravitational waves propagating through their interferometer is argued to be fatal to the whole enterprise.After establishing the cogency of this argument, the seemingly "unhackable" multi-messenger event GRB170817A is similarly placed under suspicion. Claims to have detected the gravitational waves from a coalescing neutron star binary suffer the red flag of a prominent (and suspiciously placed) glitch which prevented the event from triggering a real time alert to the community.Altogether, we have many reasons to suspect that all the claims of having detected gravitational waves are false. LIGO is a hoax. Perhaps the most dramatic way to expose the charade would be to at last perform the simple gravity experiment proposed by Galileo in 1632. We predict a result that conflicts with both Newton’s and Einstein’s theories of gravity. If our prediction is confirmed, gravitational waves and much else about modern gravitational theory would be falsified.Even if the result of Galileo’s experiment supports Newton and Einstein, we are way overdue to find out directly from Nature, instead of pretending to know, based on faith in popular theories.