That's a good idea for getting the plug out when it's stuck / stripped, but be careful if you're planning on leaving this "modified" plug on your truck (especially if it's on your drain plugs). One reason that these plugs are designed to be flush with the diff casing when they're installed is to minimize the chance of them getting caught on a rock or something when you're off-roading and having them ripped out of the diff, leaving you stranded. The front diff is not bad, but the transfer case and more so the rear diff drain plugs are quite exposed.
2002, 4Runner, Auto, 3.4L, 5VZ-FE
Mobil 1 Synthetic Oil / K&N Oil Filter - Mobil 1 75W90 Synthetic gear oil in Front, Rear and Transfer, Extended rear diff breather, Westin Step Bars, "4-air" system for airing up/down tires, Deckplate Mod,
Andymod, Dual battery setup with Optima blue top deep cycle auxiliary battery
Mods to Come:
Auxiliary fuse box,
Full time power to aux power plugs from aux fuse box