unfiabooWhat nursey did based on the screenshots of seen in this thread is only a crime in states with that law about the corruption of minors morals. No pictures were exchanged, no sexual acts took place, nothing was forced and there was no IRL interaction and nursey didn't pursue an IRL interaction.
plus based on the timestamps, she stopped once she found out he was under aged (except for that one chat where she asks if he's legal yet), she's banned, going to actual authorities would be a waste of time as nothing would come from it imo.
Why should it matter if she "didn't know" that they were underaged? The tf2 community is mostly made up of kids, besides that excuse wouldn't fly irl and it shouldn't fly here. That's just the basics of consent, everyone should be absolutely clear on the age of their partner before trying anything with them. If you don't know then just don't do it, it's really not that hard.