In my local paper (AJC) they have a section called the Vent. The rules are simple.
It must be 1-5 sentences.
There are no debates or trolling but you can respond to other posts.
Your vent can be political, regional, schools, sports, living, parenting, the way people drive, the health care system, etc.
I'll copy a few to get things started and to give you an idea.
If you have any short 'vents' feel free to add!!
**edited to add a few more details**