Truthfully, if you don't level on your own, you'll be able to hear all the sounds you want, but you'll suck so bad at the gun that people will make fun of you.

Here are some sample sentences someone might say.

"Omg, lvl 55 feeder."
"Sadness, lvl 55 also not positive score."
"How come my team got so many 55 but all feeder. Sure hacker."

I'm sure quite a number of us have heard it already.