Trade_GHS_Minecraft_SXH_V2: Grappling hook exploit

[Honeycoin]

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.

http://youtu.be/WiV9k0Bl8dI

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

[Vaustick]

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

[Capn Pyro]

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.