I use the ever living hell out of .git/info/exclude. Works great for scripts/Makefiles I only want locally and collaborators wouldn’t care about or be able to use.
I did the exact opposite of this in 2011 and it was the easily the most memorable 3 months of my life. Takes some planning (mostly making sure visa dates line up) but it is an incredible experience.
I’m arguing that just because a baseband processor is involved that doesn’t mean IMSI tracking is a vulnerability of the baseband processor itself. IMSI provisioning and randomization cannot be done without cooperation with the network operator and has nothing to do with the baseband processor itself.