as far as i read on the rules, this is allowed
PvE Specific Griefing
> Game Blocking - you are not allowed to block other tribes from playing the game on PvE servers. This can include but is not limited to:
Building at their base
Blocking in other tribes dinos
Blocking access in/out of a tribes base
Obstructing pathways or waterways for the purpose of denying another tribe access
Blocking access to important resources (ie. charge nodes, gas nodes, Extinction City Terminals, etc)
Intentionally filling the server tame limit via spamming tames (such as Dodo, Jerboa, or easy to ‘tame and maintain’ dinos) and/or rafts
Leaving tames inside of caves or on obelisk teleportation platforms
> Structure Spamming - placing structures down such as pipes or wires for the purpose of disrupting others gameplay is against our code of conduct.
> Intentionally using wild creatures to destroy a player's assets when not in a tribe war.
GM intervention may be necessary if your structure or creature is negatively impacting a server (ie. you block off a large portion of the map so that other members of that server cannot access it).
taken directly from code of conduct