We’ve been beavering away on a new feature for the site that will allow you to invite other members to play online. It’s safe, you can only invite someone after first requesting their friendship. Once they respond with a yes, you can send invites to play.
Access the feature through the profile link over there. Or right here, right now if you can’t be bothered navigating all that way.
Let us know what you think of the feature. If it’s popular we’ll add more stuff like this.