It's arguably an asshole move, even if legal. You really just gain the same time as the other people collectively lose between the off ramp and on ramp. In addi

It's arguably an asshole move, even if legal. You really just gain the same time as the other people collectively lose between the off ramp and on ramp. In addition you cause additional traffic on the ramps, which might hold up other road users using these ramps normally. I imagine the Nash-equilibrium of this pattern if more people does this is that there is blocked traffic on the highway between the ramps and also on the ramps.