Somewhat Dementedly Disproportionate Response [SDDR]: in the face of robust or unyielding dissent by a poster, liken them to a leper, or cockroach, or a snake or rat, or an unclean pig or dog, or a smelly drunk, or accuse them of being diseased or causing suicides or spreading germs or eating feces or causing "God" to torture people etc. etc. Linked to...
Somewhat Dementedly Deluded Justification [SDDJ]: the purveyor of SDDR later claims he or she "was provoked" without being able to show where or by what.
Sonship recently introduced me to a new term:
Graduation - In a thread where he had been thoroughly out-argued and his views highlighted as judgemental and poorly-considered he announced his pending exit from the thread by saying his was 'graduating' on to a new topic. (In lower circles we describe this as escaping with one's tail between one's legs).