Visiting Friends

I visit my neighbors every day unless the timer gets pushed too late at night and I have to skip a day to reset it to morning. I keep most of my short time houses and buildings available for my neighbors to tap and since I play many times a day I'm able to keep clearing them when neighbors tap them. I like keeping a mental tally of which neighbors visit my town (I keep written notes during events if it's important) but I'm mostly interested in keeping track of which neighbors don't have anything for me to tap when I visit their towns. I'd much rather see how long it's been since they logged in under their names or have a leaderboard similar to the THOH one where you are scored based on how often you visit and how many things are available to tap in your own town. This way I could easily keep track of which neighbors are consistently at the bottom of that list and get rid of them.