I used to roleplay one of my character's as a murderer or someone who practices ritual human sacrifices. These roleplays had not other purpose but giving my character some (gruesome) depth. Now, it was never intended for anyone to actually find out that my character was a horrible murderer, and thankfully everyone respected the sanctity of the roleplays.
I did roughly the same thing. I'd RP whoever is in the region or it's lord, wait until the specific string of murders was over and post it to the RP forum. In the game I wasn't even sure if those people were active or cared about the little blurb of RP as they were going about their business, so the RP board felt like a good way of generating rumor in-game for people who would care and weren't in the regions I operated in.
