Me... I would wear one, but then I couldn't focus well enough to kick someones butt while trying to keep the straps from digging into my shoulders. I had two choices, stop wearing bras or pay for reduction surgery. Even the sports bras with a lot of support from underneath end up digging trenches into my shoulders. You can only have so many back spasms due to the pressure on your shoulders before you figure out that you have to stop wearing them.

i wear a corset most of the time when I have to be out in public but you can't do a tornado kick if you can't breath properly. So, yeah, I would go into battle without securing them.