Thats right, Blender allows you to animate (almost) everything that a user can manipulate. Including, oddly, the track assignment for a clip. Anyway here is proof that even a strip’s toggle switches can be keyframed. I chose flip x and color correction on/off. Then for good measure I added a noise modifier to the keyframes.
I added a bit of opacity noise too, just for good measure. I did have to change the strip’s blend type (at the top of the properties panel) to Replace, for the opacity to take effect. I guess you could apply the colour correction switch usefully to footage that has a alternate frame beat, say with flickering florescent lights, careful modification of the period using cycles modifier could help.
Have a play and show us how crazy you can get animating weird values!

Indeed crazy, no need for that old ‘LSD’ VSE plugin now then.
There’s got to be some cool yet undiscovered uses for the ‘animate everything’ principle.
How about this for an idea:
Just saw new GoPro camera bullet time effect.
This is where a string of cameras are placed side by side and triggered in sync. The resulting images can be played back across the camera string, that is each frame comes from a different camera. Thus you achieve camera spatial movement without subject temporal movement (frozen movement).
Normally you have to edit each frame from each camera in sequence.
But in Blender you can animate EVERYTHING.
Now if you took all cameras media (say 30 strips) and layered them sequentially on top of each other you could use a driver value in realtime to scrub the track value, while the stack is played back. That is animate each strip’s Track value so that the priority (or top strip) is changed over time. The other strips would have to drop to the bottom or march up at the same time. I guess thats an N+1 function?
Alternatively you could switch the Strip eye button for active/inactive but I don’t know how you would increment the affected strip.
I wonder too, if you could place a time effect strip at the top to modify the speed of the marching strips?
I don’t imagine anyone will actually bother with this but it’s a cool thought experiment, and demonstrates the power of Animate Everything in Blender.