A couple of people. Most do it to play devil's advocate though, as neither Round Earth or Flat Earth can be proven, so the noobs (Round Earthers) come here and give pictures and such trying to "prove" the Earth is round and the members (the Flat Earthers) set them straight with such comments as pictures are not evidence and neither is Google Earth, etc.
Basically, the noobs are stupid and new and argue for Round Earth constantly, while the more experienced users know that both are possible and defend Flat Earth.