It started on /co/ and spread to /b/ where it went crazy. The 4chan mods started banning people who were spreading the ponies all over the place so the /co/lts set up FiMchan whilst the /b/ronies set up Ponychan. Because a lot of /b/tards like to follow Rules 1&2 they don't talk much outside their refuge, the /co/mrades are a lot more vocal, they even have a club on dA.