I have used mine for many many yrs, and at times have deer 15-20 plus of them any where from 5-50 yrds DOWN wind of me and NO issue's
YES it has an order to them, but it seems to be one that doesn't effect game
I have a LOT of critters here and get all sorts of them to come close to me when I have used mine
rather risk, scaring a few critters than donating a pint of blood and swatting at them pesky bugs, way more movement than I wish to be doing while hunting!

your call, but I have no issue's with using and killing deer!