This might apply to WorldHopper.randomHopInF2p() as well, but I haven’t tested to verify.
Currently the hopper will attempt to join Deadman and High Risk worlds. I’m assuming PVP worlds are also able to be hopped to. This adds a dialog when hopping and in the case of Deadman, breaks entirely. I believe PVP, Deadman, High Risk worlds, and all of the skill worlds (unless a check is made) should be omitted from the random world hopper.