With superhero teleportation there are usually some rules that might stop some of this wider application. Quite often they have to have line of sight or they need to be very familiar with a location. Blind teleporting tends to scare them. A sustained route for teleportation is something that usually requires a lot of concentration. More often they are only in whatever lies between for milliseconds, if that. It's also suggested in a lot of the comics and derivative works that most teleports work by way of another dimension. One that nullifies the rules of our dimension as soon as it is entered. When exited it's like a soft reset on physics here.,(reply>), even if its using other dimesions laws of physics will still apply in our dimension energy has to be conserved you can have an objec go from on location and then pop up elsewhere with less or more energy from nowhere. like that portal example you could then theoretically teleport a magnet to the top of a coil giving it gpe and it would fall through losing that gpe energy whilst making electricity when it gets to the bottom just teleport it back up and all of a sudden it has gained a bunch of whole new Gpe