If you Command-Click on automation parameter in the track view selection menu, you can suspend automation for that parameter.  Very handy, for example, when you want your mute automation to stop being annoying, or you don’t want a plugin’s bypass automation to fire.  Note: This shortcut does NOT apply to all tracks with the addition of the option key.
Update: It totally works now:
Option+Command+Click disables that parameter on ALL tracks.
Shift+Command+Option+Click disables all automation parameters on every track!