Thanks vputz
If you get a chance to try this for a test I would be really curious what you find out. I tested with a dead short, so it will be interesting to see how a more realistic failure looks.
I posted in the software section for how to code this "legally"; or if it would be a candidate for a core change. I think the best "legal" way to do this is to essentialy copy the wiring_serial library to a new name say "test_serial" with new function names. Then as long as you only used functions from the new library, the orignial library should not link.
Only problem is, I cant figure out how to make it compile when I do the rename.