Looking at the Lemmy.world legal terms it looks like they’re mostly concerned about Child Pornography and actual illicit drug transactions. I would refrain from posting anything that’s illegal where you are as well, but obviously I can’t tell what that might be. So no I wouldn’t expect a small town in Texas to be moderating legality here any time soon. To be honest I’m pretty sure that rule is there for liability reasons, it’s certainly not something that I would use unless it’s blindingly obvious like someone making a community to trade murders. (conspiracy to murder generally being illegal everywhere, and murder trades being a weird but real thing.)