There's some debate over on Reddit about the merits of forcing abandonment of tiles for inactive players.    Here's my list of reasons it's a GREAT idea:   (1) NO MORE SKY GARBAGE: Before the advent of the space elevator many players built large towers to get to space, now an endless hazard when flying around. As unsub tiles are claimed and their towers demolished, we can get rid of the sky garbage. Like this monstrosity that has been left abandoned for a year: