SafeQueue

What does SafeQueue do?

SafeQueue is an extremely lightweight addon that does the following:

Removes the "Leave Queue" button for arenas and battlegrounds
Colorized timer on the popup indicating how much time is remaining to join the match
Prevents the popup being closed by hitting the ESC key
Displays the time you waited in queue when it pops and (optionally) announces to your raid or party

Slash Commands

/sq announce (Announce the time you waited in queue when it pops)