Next time you park your aeroplane with next to no fuel why don't you ring up your local Casa inspector and ask for a ramp check!
CASA would only be interested if you have broken some law. To have burnt some FR does not necessarily imply you have broken any laws.
If you are a private operation, then the only rule you may have broken is the one relating to submission of a report.
If a commercial operation, then whether you have broken anything depends on what it says in the "fuel policy" section of your operations manual.