From Tapestries MUCK
In a world where consent is sometimes not present in Roleplay, or In Character (IC) it is very important to make sure that you can clearly state that what you are saying is not just token protests that are part of whatever game your playing at the time.
In a Real Life (RL) BDSM (Bondage Domination Sadism Masochism) game/scene, the way to indicate that something is not part of the game is to use your "Safeword". A Safeword is a word you set aside to mean "Stop, we need to talk as equals and/or stop play."
On tapestries, the word itself, Safeword is recognized muck wide by everyone, much as it would in a RL public play space. Failure to respect Safeword is, in fact, a violation of this policy and could lead to your ejection from Tapestries. We consider this a very important concept to insure RL consent between characters.
Another commonly used form of Safeword is the Green, Yellow, Red form, derived from traffic lights. Green means go on, go harder. Yellow means, slow down, do something different, and Red means Stop, like Safeword described above.
If your new to this sort of play it is strongly suggested you look at soc.subculture.bondage-bdsm FAQ.
Another useful tool, one that is not available RL, is to use the whisper command to discuss the roleplay OOC (Out Of Character). If there is something you are not consenting to often times you can work with your playmate/partner to redirect the play somewhere you both are comfortable before it comes to the point you need to stop it.