Does anyone know of a solid proof that either 1) LHC won't create lab universes or 2) if so, it already happens all the time anyway? I expect that both 1) and 2) could be shown to be practically certain but I haven't seen it addressed anywhere.

Also, is time travel via traversable wormholes a possible risk? You'd expect it to already have happened, but maybe in a particle accelerator unlike in the wild time travelers would know the necessary coordinates or something. Again it seems quite improbable but it could have been addressed.