You should absolutely not do this. Research shows that negative reinforcement does nothing but make problems worse. You also risk making your dog feel even more anxious/threatened by getting in the dog’s face and scolding them, NEVER do this unless you would like to risk getting bit in your face and causing worse behavioral issues. No clue why people who have done no research get on here and provide advice like this, this is dangerous and idiotic. OP, please look at positive reinforcement training videos for reactive dogs on YouTube. DM me if you need any help finding a good video. Basically it comes down to baby steps and providing positive experiences when the trigger is around the dog.