Amen. We're pretty careful about not putting +V and GND right next to each other on a punch block, too. Too easy to slip with a screwdriver or a test probe.
Just got back from a workday there - one of the tasks, as it happens, being installing and wiring some extra punch blocks to separate control signals from audio. They were separate initially, but then as things got more crowded we ended up sharing some; now we're back to normal.
That's why I do community radio. I've done a fair amount of commercial broadcast engineering over the years, and I'd willingly do more, but it's never been as close to my heart. Community and student radio is fun, because people only do it if they care.