I wonder what's the risk of death from sitting in the front row at the sumo match...
Anyway, your paper is even more scary:
"Spavieri et al. reported that if differential simultaneity with Einstein synchronization is adopted in describing the linear and circular Sagnac eﬀects then light would cover an open path that does not match the closed contour in the measured time interval, leading to a space discontinuity"
What if the space discontinuity exists! Another phyctional creature a la blackhole.