My vote goes to the patched bonus track idea. With the "original" track with warts or fade in/out depending on how offending the warts are.
Some time ago I went to see some friends play on a trip back to my home town. Still had a shirt rigged for lo-pro from a concert I'd taped couple of days before, so I impromptu put that on. Old friends from back in the days kept coming up to me greeting me on the top of their lungs directly into the mics.... The song that was worst affected was the best version of a song they played twice, so I cut and spliced. Admittedly this was nowhere near a professional recording (or even skilled amateur
) and the whole thing was thick with ambience of the properly liquored audience. The 20 second fade out in the middle of the song rendered it a track I would not enjoy listening to. Too much of a disruption. I do enjoy listening to the spliced version though.