[excession]

well obviously - 'thank you'

often both abbreviated to 'nc' and 'ty' ...

I don't think saying 'nc' means the guy is especially liable to tilt - if you're going to say anything at all after getting sucked out on 'nc' is pretty much at the bottom end of tilt indicators (maybe one up from 'nh').

Best practice is just to stay silent of course..

Now is someone starts ranting that you are a fish, then you have a much wider and more amusing array of responses at your disposal - one of my faves being 'and you just paid for my new tank, thanx'