the.com/illegal
The line society drew in the sand, with handcuffs waiting on the wrong side.
means Forbidden by law, so that doing it can get you fined, jailed, or otherwise officially scolded.
from From Latin legalis (of the law) with the negative in-, arriving via French; literally not-lawful, the law's official no.
Not immoralLegality and morality overlap but are not twins.
Local rulesIllegal here can be perfectly fine elsewhere.
Once lawfulPlenty of crimes were yesterday's legal normal.