I use straps all the time. (actually versa-gripps). And I have never had anyone bust my balls over it.
They are a great tool. DOH grip is far superior for development on deads. It has been shown that the underhand side lat experiences much less activation in a dead. Also it practically eliminates the danger of tearing biceps that come with mixed grip. If you can do a hook grip, then great but I just use straps in much of my training. Anything over 3 reps, I wear straps because I want to use DOH and want the equal stimulation. When I am practicing 1rm I will use mixed grip.
I am not worried about grip failure on singles as I am sure I can hold much more then I can lift for one rep. Dont let your ego get in the way of using something that can actually benefit your training. There is a time and place for many things.