Oh my goodness - please do NOT feel guilty! Why? Because someone on a self-righteous (and ill informed) bent asked you why you'd risk FAS??
You posted because you were treated rudely and inappropriately. End of story. You do not need to justify ordering a half pint of alcohol.
People will always comment - particularly it seems, if they have something negative to add. I guess that might just be human nature. I am so disappointed that the FAS line was brought up - it's out of context in this thread and you should ignore it.
Over here in the US, the guidelines are very different from those in Europe. The US guidelines are not better or more correct or safer than elsewhere - they are just different.
I do wish people could be more open minded and less judgemental on this website. I realise I am coming off as a moany old cow, no doubt with some self righteousness thrown in there too, but sometimes I see people being nothing short of bullies in what they write here.