I'm at least 6' 4", depending on whether I'm wearing boots. I always ask the person behind me prior to reclining. At least it gives them fair warning that something is about to happen.

Now that 'moving around the cabin' is restricted, I'm worrying about the health of my legs, but that's another subject all together.

Parents who can't control their children in an airplane are in for a very bumpy ride as the children become teens.