I too get easily annoyed by constantly screaming fans, but I'm probably too old to understand that
*waving to the other aunties* 
but I also never understood why people start screaming like crazy at concerts. Not before or after the performance, but during a song, all the time, without even taking time to catch their breath (don't know how that works but some people manage) If you like a person's performance so much that you are willing to spend money to see it live, why would you keep screaming your head off during the actual performance? I just don't get it