Which internet phenomenon is xkcd mocking in the comic below

OH HAI!
THSE PEOPLEZ HAS GOT ANS sidsen , shreyas , iamniks , alephnull , shyam , udupendra , Suyog , Tathagata Chatterjee , VikraM , vijayaraghavan , bobo , Quehin , piezocake , Keerthi Kiran M , prasanth , Gammafunction , nisha’s thambi , Abhishek , ganesh , yaksha and Goutham.
KTHXBYE

sidsen, shreyas, iamniks, alephnull, shyam, udupendra, Suyog, Tathagata Chatterjee, VikraM, vijayaraghavan, bobo, Quehin, piezocake, Keerthi Kiran M, prasanth, Gammafunction, nishas thambi, Abhishek, ganesh, yaksha and Goutham