Steering Column plastic piece

Looks like there's a pretty clear witness mark for where the shaft is supposed to be in terms of length (that line of surface rust). If you're worried about it, you could collapse it where the rust line lines back up and drill through the shaft where that little nylon plug is and install a nylon screw. through the shaft.
I mean the shaft is still pretty stiff sliding into the other one, I don't think it will affect anything, the only reason the piece came off is because I pried the shaft out a little wondering why the column lock plate did not come off only to see that it has a pin on it with a cover over it after I read the factory manual.

If its truly something that is making the column dangerous then I will change it.