That is EXACTLY the scenario.
In the meandering discussion, it wandered on a case where these two young soldiers where charged with Statutory rape
after they had consensual relations with two young girls who were drinking in a bar - they had shown (fake) ID to the bartender in order to be served but were under age.
The young men to my knowledge did not ask the girls to show them ID, probably assuming that they were of age if they were drinking in the bar, etc.
At this time, I've lost the link to the news report, so I cant say what the current status is, but regardles, the debate centers on: If they had asked the two girls for ID and were presented with same, could they have a defense
( I acknowledge there are obvious caveats: the apparent age of the girls, the "authenticity of the id and any efforts to verify same" etc
Lets say the girls look old enough and the driver license was checked via FLdmv.org and found to be a valid license.
We eagerly await your learned reply!