Acceptable self-harm is drinking a pack of off-brand biscuits through several cups of tea every other evening. Acceptable self-harm is binge-watching an entire season of whatever's hooked it's tentacles into the reward pathways of your brain in one sitting. Acceptable self-harm is buying into vicious ideology because it makes you feel deep connection while othering.
Unacceptable self-harm is when your wrists ache for a sharp edge, or your brain itches for a chemical foreign to it.