just so you dont get stupid responses anymore, no, they will not. first of all, its not illegal to posses tobacco. its illegal for a minor to be sold tobacco products, but not fucken illegal to posses, come on man...
and no, half the time they dont even check the date on your license, so as long as you dont look like your twelve, you should be fine. hell, ive boughten seegars with a friends ID once, who isnt even 18 fine /claim, and im 15!
in the occasion that they do check, what will happen is they will reject you, and it will be embarrassing. just be semi-smart about it. dont do it if theres a cop in the store with you, and stuff like that.
think about it, is it illegal to TRY and buy weed?