I'm in the opposite camp to Doddy in that I don't use any bleed resistors. Why? Because they only matter in practice if you are running the PSU with no load. Once it's all in and working, the load on the PSU is going to discharge the capacitors anyway. If it's a switch-mode supply, then the actual capacitor value is quite small - my 24V supply feeds, amongst other things, the "Mains On" LED on the front panel and that and the motion controller between them discharge that supply very quickly - the LED goes out with no measurable delay when you hit the mains off switch. The 68V main driver supply has four stepper drivers permanently connected; even in "disable" mode when the output devices are presumably switched off, they draw power for their internal electronics and again, that's enough to bring the volts down fairly quickly.

While a bleed resistor won't do any harm, it's something else to house, it wastes power whenever the PSU is energised, and it can get hot.

There are different ways to look at the problem and estimate associated risk. For example, I don't have an interlock on my control cabinet that cuts mains power when it's opened. You pays your money and you takes your choice!

Although a bit of a belt-and-braces man, I personally stop short of the electric trouser hoist!