I haven't had an NA, but I do drink OJ.
I don't know if I'd do NA, but I don't think it signals relapse. Hey, if it's not a trigger for you to drink the real stuff, chances are pretty good it's not a problem.
For some I suppose it's a road to hell. For others it's like drinking diet soda instead of regular.
I had some candy the other day that tasted like peach schnapps . The candy had no alcohol. I didn't drink because of it. And, I know, everyone is different.