Another bit of rage that only seems to matter to me on the subject of common courtesy: If a person says they don't want to do something, provide a reason, the appropriate fucking response is not to go 'Fuck your reasons, do it anyways'. And if you point this out, everyone who witnessed it jumps on you for using terms like 'Screw you' in response.
Example: Person A says they're withdrawing from a game because A: They made their intentions clear in the interest check thread, has already played the module in question and was only interested in playing a character type that is the same type as most of the big bads to explore how things might change under the DM, B: Has chosen to exit in as inoffensive a manner as possible after clarifying with the DM.
Person B says 'why don't you play a different character', quoting brief explanation made by Player A and clearly not reading any of it.
Person A points out why this is disrespectful as fuck.
DM jumps down Person A's throat.
You know what? Fuck you. It was a reasonable response to this bullshit, and I'm tired of seeing it go unchecked when otherwise amiable people are being told 'Fuck your reasons, do it anyway'. Fuck you Person B, fuck you DM for letting that shit go on, and fuck you twice DM for jumping down my fucking throat for pointing out it being an idiotic, fucking disrespectful response.