I made a demo to see how far out you can travel from the normal play area on an FD. Here's what I found: B can go for a long time before he starts to disappear into white space. However, if you zoom in, he reappears! So you can keep zooming in until you reach a point where the FD is no longer draggable. A bot such as L or R continues walking on an FD and isn't affected by how far out it goes. After only a short distance B can no longer move by tapping the block next to him. See the screenshots I took as I moved further and further out. These were taken on a mobile phone so it might differ on a larger screen such as a tablet.
