The net result is that I have transmitted a message into my own past.
Basically, FTL automatically lets you make time machines, and this is bad™. It just doesn’t make any physical sense, so the consensus is bad things happen (like black holes forming) when you actually push against the speed of light, with very reasonable explanations for why this happens.
The exception is wormholes ,which are theoretically possible “FTL” travel, but only if you are very very careful about where you put them. Otherwise they explode.
Well the jist of it is in one sentence:
Basically, FTL automatically lets you make time machines, and this is bad™. It just doesn’t make any physical sense, so the consensus is bad things happen (like black holes forming) when you actually push against the speed of light, with very reasonable explanations for why this happens.
The exception is wormholes ,which are theoretically possible “FTL” travel, but only if you are very very careful about where you put them. Otherwise they explode.