First of not sure if I am posting this under the right area so mods please feel free to move if not correct. I need some guidance I guess and figured a lot of wise people here that can probably give me some pointers.
As you can see I don't post very often (well almost not at all

) her but I do enjoy reading and following discussions on this site. I guess my main reason for not posting is that I only served for 3 years in the mid to late '80s and another 1.5 years in early '90s in the Army reserve so I am not up to current CF military stuff / topics that are often discussed on this site and feel that my contributions on certain topics would be irrelevant other than as personal opinion.
I volunteer with a community organization and enjoy giving my time to this organization and interacting with the members. One issue is a new guy started volunteering in June '11 and for whatever reason latched on to me and always wants to chat when we are there together. 'Whats wrong with that?' you may say and usually I would say 'nothing' except he found out from another volunteer that I served in the CF reserve. He immediately asked "Did you serve in the CF?" and I replied that I did (what a mistake

) and that I was Army reserve infantry. Without me asking, he told me that he served too and when I asked Reg force or Reserve, he stated "Neither I was sort of On-Call Army as an Officer" but that he couldn't talk about it? and he literally winked at me and said "You know what I mean" with a smile. He later stated that he also was asked to quit the CF by the USMC and join them as an officer (I thought that only US citizens could become officers, he is not one) to do operations around the world but that he didn't do it for long as it was tough on his family always working on stuff where the US government would deny his existence if he was caught??
From what little I know, this guy is full off

(I could be wrong), but my problem is that I don't know how to tell him and call him out on it. There is always other volunteers around and some of the younger guys and girls there believe what he is saying and sort of look up to him. I don't want to embarrass him in front of the other volunteers but maybe I should? What would you guys do in a situation like this?