Lets take this idea even further...
Many champions have "wallhax" abilities that allow them to dash, vault, or otherwise ignore terrain. What if we were able to come up with a jungler (say...maybe one with acid soaked blades that can scratch walls) to essentially punish people who pass through terrain they've recently marked? It's a bonus to map control, if anything...though blinks and certain other abilities (i.e. Bard's E makes a portal, so technically he's not passing through the wall, and Reksai's tunnels are technically going beneath it) may be left out of this effect for the sake of aesthetics.
Not a complete thought...but it's something not really covered yet. The closest we have is Azir's ult knocking back people who try to dash through it. But currently nothing to actively set up and block an escape route by booby-trapping it like that.