How Do You Control for Social Oriented Features?

When you're testing out a feature that's very social oriented or it's like interactions with other players or users, can you kind of like isolate that between the control group and the sample group? What extra considerations do you have when you have this user or social oriented features? Social oriented features. The hardest thing that I've seen in mobile gaming to do this is if you have global chat, right? And global chat is the worst thing to come to like AB testing area because people post like, "Oh, this thing costs 50% less than someone else's" That's a huge issue.