Stealth 99 ;)

Usually take mine off. Though there are times I forget I’m even wearing them.

If they go mach+ only at altitude, don’t think it’ll be a problem. Back in the 90’s as a kid I lived near a military bombing range in southern California. Jets would often be flying supersonic. It shook the walls just as much as the actual bombs sometimes. But they were already flying fairly low on approach to the range. It was hard to tell what was a sonic boom, explosions, or an earth quake sometimes XD. Then you’d have whole formations with apache helicopters and the cargo/fortress bombers with jets…

All that said, as long as they’re only allowed to go supersonic at higher altitudes it shouldn’t be an issue.

A lot of other organisms will eat their young. Kinda messed up. Some apes try ripping each other’s genitals off during fights. The insect world in general is pretty brutal tbh.