Pretty much. If you do, using some kind of cute trick like Alcubierre metrics, you break causality, guaranteed. Clickbait is actually flattery, I think. These headlines might as well be “bat boy”.
Showing a subluminal one is possible without negative energy density is really neat from a theoretical perspective, but gravity is weak. If 99% of c is all you need it’s almost certainly easier to use the hypothetical reaction engine of your choice than burrito spacetime.