Youd use the same grammar as you would when referring to someone whose gender is unknown. For example, if a locksmith is on their way to your house and you dont know if theyre a male or female, you might say something like I got a text from the locksmith. They said they are on their way here now. So yes, youd keep it as they are.
Yes, it is against the terms of service. Do not use the boards to set up orgies.
-Alucard188