Thread:JEAN9999/@comment-5979819-20150629062620/@comment-5454372-20150704021956

If you're after security or privacy, using the "Private Message" function in any Wikia chat should get what you want; it won't matter whether there are other people there as long as you're typing in the right sub-window, since they won't see what's being said.

I could also suggest something like creating secondary/new accounts on Facebook, KiK or the like if you can't meet up at the same time so you can talk asynchronously. Keep in mind that anyone that sees your account names could message you, which is why I suggested "secondary/new" accounts -- ones you can just throw away or deactivate when you're not using them to effectively filter out spam or other troublesome messages.