I went through something like this several years ago. I was buying a new mouse for my computer and my voice was only so-so in those days. I also had a severe tonsil infection so that didn't help. My voice would always seem to drop at the worst times. As the clerk rang me up, they said "that will be x amount of money, ma'am". I croaked out an 'okay' and they didn't bat an eye. BUT there were these two male brats (probably about 17 or so) near me and once I left the electronics department of the shop, these idiots followed me through the store going, "Hey, DUDE" "What's up, DUDE?!". I walked to the Pizza Hut kiosk that was in the store and these idiots were continuing to do this.
I bought the piece of pizza and walked out, with them still following me. I thought to myself: "If they don't quit by the time I am finished with this pizza, I am going to turn around and knock the hell out of both of them." After following me halfway across the damn parking lot, they finally figured out that I wasn't going to give them what they wanted. If it had went on for five more minutes, they would have ended up with bloody noses, black eyes or both. Yeah, it was 2 on 1, but I was getting more pissed by the second once I left the store. The only thing that stopped me from bashing their damn heads through the window of the shop was the fact that I had that pizza in my hand.