Roleplaying Derails, also known as RP Derails or /oat/ RPs were thread-derailing activities that involved multiple users spontaneously turning the thread into an open free-form roleplaying thread. These roleplaying threads were open for any user to join, and were typically over the top and melodramatic. Initially these threads were self-contained, but stories arcing between threads developed as posters involved in these derails typically came back to the same characters to post as.
In early 2012, the Ponychan staff began placing tighter and tighter restrictions on roleplaying derails on /oat/, before eventually banning them altogether (with no announcement) due to a number of users bending the rules that were being placed upon them. Some of the more prominent posters went on to post their ongoing threads into /rp/, but many users departed ponychan after the absolute rule against /oat/ RPs was put into place.