| OneDarkCellar (Brewstein77) | Lehigh Valley, PA | 14 | 2 | 1 |
| OneFiver (onefiver) | | 105 | 50 | 28 |
| Onelouderash (onelouderash) | San Francisco, CA | 62 | 48 | 26 |
| Onlighost (Onlighost) | Yugoslavia | 0 | 0 | 0 |
| OnWisconsin (OnWisconsin) | Green Bay WI | 388 | 120 | 50 |
| oofaurotnorb (oofaurotnorb) | 2201 Ridges Road Baileys Harbor Wisconsin USA 54202 | 0 | 0 | 0 |
| ooms (ooms) | South Florida | 54 | 23 | 17 |
| OpaqueEcho | Norman, OK | 7 | 1 | 1 |
| ophildorbern (ophildorbern) | kleiner brühl 5 eisenberg Germany 07607 | 0 | 0 | 0 |
| Opsinjoor | | 24 | 2 | 1 |
| OrionToo (Oriontoo) | Denver | 4 | 1 | 1 |
| Orlando (Orramirez6220) | | 0 | 0 | 0 |
| Orzhehovskij976 (Orzhehovskij976) | Russia | 0 | 0 | 0 |
| OscarAntab (OscarAntab) | Portugal | 0 | 0 | 0 |
| Oscaroxync (Oscaroxync) | Malawi | 0 | 0 | 0 |