Prioritize flash orders (nope)

If you are working on a regular dug order and a flash order decides to pop up, do you have to stop the order you are currently on technically? I NEVER do, personally. I make them wait until the person "ahead" of them is checked out. Our store is horrible on flash, yet they STILL come our way. Wouldn't it be smarter for them to STOP flash orders all together after seeing that we HARDLY EVER stop the order we are working on to take care of a flash? Me, if I were OM in charge I'd be "hey, store xxx NEVER EVER stops their reg orders to take care of a flash. I'm going to discontinue it because obviously they are prioritizing reg orders over the flash.