Bleed in stereo cable

[T-Bal]

I was reading in the LR Baggs Mixpro manual about the phenomenon of bleeding in a stereo cable, that is the signal from a mini-mic bleeding into the other side which carries the pickup signal.
1) Has anyone actually experienced this?
2) How would you know if it's happening?
3) What exactly is the drawback if it is?

Baggs suggests using a separate buffered input jack if it's a problem, which of course they just happen to sell. From what I understand, phantom power and longer chords are esp. problematic. I am using a Ravenlabs PMB-II, and I have not noticed anything like this, but I'm not sure how I would check or what I would hear if it was happening.

[brianrost]

I've never heard of it happening.

How would you know? You'd turn off one channel of the mixer and still hear a small amount of the signal in the other channel.

Drawbacks? For a mike/pickup setup none, really. It's not like each channel has a completely different signal...they are both picking up the same thing.