I agree with some of what you say Franco re how that law could be abused, and does seem odd that you can get time in the bin for being a ****, but (only my opinion) after reading from paragraph 13 onwards guy was more than just a bit of a ****, was a total ****, and I'm ok with him getting reamed over what is described in those sentencing remarks.
https://www.countycourt.vic.gov.au/f...pp-v-pusey.pdf
To abuse that law to try to put away people that are a nuisance to you, you'd need them to have done something more than just post a few silly comments on social media...you'd need them to equal or do worse than what is described from para13 on