Does anyone really do this to their cooling system?

I unhook the heater hoses and pull the pipe plug(s) (1 on a /6. /2 on v8s).then I put a garden hose with one of those twist nozzles in the heater hose I disconnected and let er rip til I get clean, clear water out of the other heater hose and removed pipe plug. If it's bad I'll run some iron out in there and run the engine a while then flush til clear. Then I drain the radiator and block drain. And finally with straight antifreeze (not 50/50) i fill it 1/2 way whatever the capacity is, then finish filling it with water. At this point is when I have to run it and belch the air out and top off til it's full. Last, I fill the side bottle with mixed antifreeze