There needs to be an understanding and root of common courtesy between players. Just as one should not attempt to force RP on another person, one should also not attempt to forcibly shut down someone else's RP OOC.
Say for example sally sneak follows around Lord Evil-pants for the day trying to discover their secret plans. Lord Evil pants has chosen to play a high profile character with in a conflicting arena, he does not then have the right to OOCly demand no sneaks follow him around because it makes them uncomfortable. IC actions merit an IC response. First and Foremost we are not our characters
The large majority of players here are adults, and should behave like them. If something your doing makes someone uncomfortable OOC then stop in a manner that most befits the IC situation. If you are made uncomfortable by IC actions that directly relate to an IC role, step away from that role and let someone else take it. Rp is a collaborative effort to tell stories together. You can't win at Rp you can only try your best to ensure those who you're writing with have fun in the collaborative effort.Be Respectful
Players may play a character, but they are not the character. Remember not to take in-character grievances to personal, out-of-character attacks, nor to use out-of-character motivations and agendas to fuel in-character behavior. Even when your characters are bitter enemies, remember to be respectful towards the players and that the goal of your interactions with them should be to have fun.
If you are uncomfortable with someone's RP, you have the right to respectfully back out of the RP. Always remain polite and courteous when doing this. If someone chooses to back away from your RP, respect their decision and let them go.
If you don't like someone, don't get involved with them. There are enough players in the server to go around that you should not be obligated to RP with someone who you don't like, and RPing under a hostile OOC environment only breeds poor IC and OOC behavior, drama, and frustration especially if staff gets involved.
Tl;DR
Communication is key and consideration is king, remain always within limits.