So safetywise,here's a hypothetical. Long vfr Xc, clouds quickly building, and you realize you're lost all at the same time. Looking outside, you see a lake with nothing else around it, just a lake. You find what you think is the lake on your vfr sectional, and find a vor 20 miles away and tune it, and nothing. Finding the radial to verify where you are would help an awful lot, especially if there is an airport nearby as well (although there's a few of those that are on sectionals as public with fuel but are actually closed...even the google satellite image you can see the x along the runways...). Try the radio of course, but suppose mr. murphy got your number today and that crapped out too. Obviously, one could still theoretically live to complain about it, but the charted decommissioned vor could also lead to confusion in the chaos, and while by some measures not be a direct safety issue, but could certainly contribute to an accident.
Personally I think a point charted as part of the airway system should work as intended and charted. If it doesn't work or is effectively out of service, it should be charted accurately whenever the new charts are issued. Obviously we need to do our part in planning the flight, but the system supposedly there for us to rely on should work, and if one is so far off route that a notam didn't even show up (yes, REALLY bad planning) then its status on the chart should be more reliable than some of these navaids that have been notamd for years and not stricken from the chart.