Waywards are very, very sloppy, and they assume that you are very, very dense and that they are very, very clever.
Snooping is not for the weak or emotional. It can help you detach though, because you have to deal with what is actually going on.
You also have to be very careful not to let slip things that you have no way of knowing.
There are downsides -- you can end up building quite a wall of your own, and become as unreachable as your wayward.
The other thing is that you get far too much detail. If you ever reconcile, there will be triggers everywhere, in all aspects of life. That's a problem for another day, though.