I've been riding with Campy Tipo's and a lockring since I finished my fixie with absolutely no problem. I don't ride brakeless so no skidding thank you. I do use my legs to slow and stop most of the time, and I can trackstand for long periods so I am bumping the cog in both directions. If you use a good quality hub I can't see any reason it would fail. I do check the lockring from time to time but it hasn't budged.

If you're concerned use some of the Locktite that can be removed to help keep it together. If you are into riding brakeless and want to skid then I might think twice about it because you're depending on the lockring for your ability to stop. Not sure it's worth the risk. But then riding anything brakeless is a tradeoff IMHO.