Answer:
An appropriately loud response to fear, excitement, or your team scoring.
Your computer\'s version of white-out.
A defendant will go free if a reasonable amount of this exists.
What has many keys but cannot open a single lock or door?
Poor people have it. Rich people need it. If you eat it you die. What is it?
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.