Sure it means something to N. American readers. It means someone outside the U.S. has posted a warning. It means one should think of the nearest equivalent in our country (that would be NC-17) and assume it means that until one finds out differently if you are at work.
It is widely known in the United States that Amigas are more popular with Europeans. Its also widely known in the United States that Europeans are more lax on age requirements to view nudity and sex acts. An American would write 17+ or 18+ for such material (we'd write a higher age and put the plus symbol after the number, not before). Therefore "+16" is quite clear regardless.
The OP also wrote "be careful". You are sadly an example of what gives us Americans a bad name abroad, you take no personal responsibility for your own actions.
Okay...first of all, I'm not American. You American's shouldn't assume that all people that live in N. America are from the US or you'll sadly give youself a bad name abroad. Secondly, the original poster has edited his message from the way it appeared originally when I saw it. When it was first posted all it said was something like "New Commodore Shot [sic] film +16". It did NOT say "be careful" when it was first posted.
"+16" doesn't mean a heck of a lot....I thought maybe he meant it was shot on 16mm film because he mis-spelled "short" to "shot". A lot of amateur film makers shoot in 16mm film.
Heck, I don't really care about his whole thing...but I'm merely pointing out how confusing the original posters message was with the vague description and the mis-spelling.
