I know this command doesn't depend on a lowercase `pin` variable so there is no danger. Note that this doesn't change the variable in the shell, just the executed command.
IDK, environment variables get set all of the time, I rarely worry about them breaking programs. Their job is kinda to live in the background and be passed through programs so it doesn't feel like much danger. Especially when I use lowercase and almost all programs use uppercase.
But I guess everyone has a different risk level and what feels near-zero to me is meaningful to someone else.
Cute trick though, will work it into my workflow and see how it feels.