To the 99.9% reasonable posters on the forum:
Duck and his ilk is the obnoxious kid on your bus that your mother warned you about. Giving attention, even if it is negative, only encourages him. Ignore his (their) posts, don't boo him, don't quote him. Soon enough, he will starve from the lack of attention. At that point, he will take on a new moniker, but you will easily spot it by the acidic non-sense coupled with poor grammar and sentence structure.
To Duck and your socially-challenged confederates:
Obnoxious does not equal thought-provoking
Abrasive does not equal engaging
Caustic does not equal conversational
Being loathed does not mean that one is interesting.
Duck, if you are having trouble with any of these words, an on-line thesaurus is available. If you spell "thesaurus" incorrectly in the search engine, Google will even correct the spelling for you!