File a flight plan on NAIPS while quaffing a glass of red at 2100 and not intending to fly till 0500? By definition filing the flight plan is an aviation activity. You are therefore guilty of a felony.
..so don't do any preplanning for a flight within 8 hours of consumption.
Better still file the flight plan, then get stupidly drunk but meet the 8 hour limit and 0.02 the next morning and you are OK!
And CASA will use your metadata to convict you if they can!