Trade_GHS_Minecraft_SXH_V2: Grappling hook exploit

So I grappled beneath the BLU spawn to where this lava thing is and this happens:
http://steamcommunity.com/sharedfiles/filedetails/?id=367406756

And just to add salt to the wound, players can reach the virtually-inaccessable nether portal from below.



Some people said that Mannpower Mode and those hooks are going to introduce more of these gambits and exploits alike.

are you srs? Everyone knows that there is a "secret" part of this map... how is this an exploit?

Weren't you able to reach that area of the map prior to the Mannpower update? Unless that was a different Minecraft map.

EDIT: Yes, this area has always been accessible; you could have just dropped down from that side of the map and double jumped in.