I confess to using multiple accounts.

Truth Seeker, Truth Proclaimer, Truth Termite, Truth Pursuer, Micro Typhoon Hinnamnor, Fool Who Only Knows Truth, Subtle Matchstick, My Ajumma, My Grandmother, Close It Soon And Cry And Pour And Blow, Hinnamnor Perished Like A Dog, I Hate It I Don't Know I Won't Do It, Person Who Drives People Crazy, One Who Lives In Hiding, Review Event Must Be A Runaway, gksskacnd, If I Lie I Die, If You Leave Malicious Comments I Die, My Dog Barks Whenever It Sees a Man, Kind Comments Like 1004, 1st is 2nd but 4th is 4th, Trash Criminal Waste Chromosome Y, Soft Steel, 1-Click Rising Bird, Lee Jae-myung Hardcore Fan, Beautiful Comment, Mung-the-Koo, Sleepyhead, 6664444, You Live Longer If You Get Insulted, The Protagonist of Stir-fried Seaweed Haley
These aren't just nickname changes; most of them are nearly identical to identity theft crimes involving new registrations.