Where I have flown aircraft without a rotating beacon (C404, C402) I have used the navigation lights in lieu of to show that the aircraft is active (for want of a better word). Strobe lights are turned on when entering the runway and turned off when exiting same. Annoys the beejeesus out of me to see strobe lights flashing away on an aircraft as it taxies past.
I noticed the MFS Warriors (most don't have rotating beacons) start to taxi with the strobes on a couple of years ago. I imagine they were given some sort of directive to do so, because they all seemed to go from not doing it/doing it overnight.