How about implementing some sort of "guest book" function to our lairs. It could have the following functions among others: 1) Letting us know who has visited our bases, including date, time and how long they stayed. 2) Gives guests the ability to leave a comment to the owner such as "your base sucks", "sorry for clogging your toilet." or "finished all the soda in the fridge." Along those same lines, maybe also create a base item (let's call it the "cookie jar") where visitors could interact with it and receive some sort of gift from the owner, such as random things we acquire that we don't want. (gear, R&D materials, sodas, money, collections, exos, etc...) And the cookie jar only gives one item per guest, per visit, per week or month. You get the idea.
