When you start randonauting, you begin to notice that the writings on the walls have interconnected content, similar to an attempt to communicate with him.
This is caused by the void-meme. It could be confirmation-bias, but often the writings are so improbable that it seems supernatural.
When you visit an attractor and you see writing/graffiti or something that is coincidentally meaningful to you, or maybe keeps reoccuring during the points chain.
A great example of talking walls is when someone went to an attractor and saw "daisy+rocky" written on the pavement, which was the name of their two cats.
Or when someone went on a points chain and kept seeing "love" spraypainted, there are a few examples of repeating graffiti at attractor points chains. it almost seems like the universe is talking to you.