It violates the principle of Least Surprise; if I'm invoking run0 I'm expecting it to run my program with a different UID and return the same stdout I'd have gotten if I had just run the program in my shell. Not inject a whole bunch of color control bytes in there. Which hopefully my terminal will handle. Unless it doesn't.

I'll give them the benefit of the doubt and assume they only do this if $TERM supports color. But still. That $TERM variable can surprise a poor programmer in all sorts of ways.