If the morph is zero, it cannot possibly affect the character morphing when removed - ever.  Except....

If the morph is slaved or master to another dial, then you've got trouble.  This is where Poser sucks (yes, I said that).  Tell me where you find indication that a dial is master/slave of other dials in Poser (answer: nowhere).  My interPoser Pro C4D plugin not only indicates if a dial is master/slave, but you can also see a list of the dial's masters and slaves - eventually it will even allow creation/removal/editing of master/slave dials - something you cannot do in Poser without a Python script (if that can even be done).

I think that there is some confusion here between Inj/Rem, just hiding dials, and something like Dial Cleaner.  Believe it or not, all of those Inj dials already exist on the figure (as those PBMDC_ channels in the CR2 file).  Channels (dials) cannot be created out of thin air it seems.  These 'reserved' morph dials are hidden and contain no morph deltas - until you Inj.  Then the dial is renamed, made visible, and the deltas added.  Rem changes the name back (usually), hides the dial, and removes the morph deltas.  Just hiding the dials will not remove the morph deltas - and they will be in the saved file.  And Dial Cleaner, if I understand what it does, actually deletes the unused dials from the saved file (the chosen PBMDC_ channels are removed permanently).

The safest route is as dbowers22 stated - unless there is a script that simulates the Rem process by hiding the dial and removing the morph deltas of any zeroed morphs.

C makes it easy to shoot yourself in the foot. C++ makes it harder, but when you do, you blow your whole leg off.

 -- Bjarne Stroustrup

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