Originally Posted by FBinNY

Sharp cutters made for the job will not fray a multi-strand wire. If one strand does separate it still has memory and can easily be twisted back to stay long enough to get a crimp on.

If you're super paranoid, you can purchase shrink fit tubing in places like Radio Shack. This shrinks when heated and makes nice covers for bare wire along the frame tubes to prevent scratching when carrying the bike (far better at the job than the little donuts sold for the job.

You can also use as a anti-fray. Cut a short length, slide it to the cut, shrink it, then cut the wire through the tubing. Leave it on in lieu of a crimp. It'll be easier to slide off for service than a crimp is.
I personally have never been able 2 slide off a crimp
This is probably overkill, but is for those who can't accept a simple solution for a non-problem.