Depends on the drone. I have a commercial DJI drone that has sensors and a nice easy mode that will stop you crashing into stuff (at least forwards and backward

Depends on the drone. I have a commercial DJI drone that has sensors and a nice easy mode that will stop you crashing into stuff (at least forwards and backwards, there are no side sensors). But it also has a "sport" mode that disables the sensors to allow faster flight. I also have a home built racing drone that has no anti crash sensors, very little natural stabilty and can fly about twice as fast. It's insanely fun to fly, but believe me it requires very quick reactions and I crash it regular even when sober.