Player-owned and placed pumpjacks can be opened and looted (both the LGF storage and Crude loot containers) by anyone.
Tested: Had a random person open the containers on a PJ owned by the player who reported the issue. Could open and loot both containers (no team or shared TC access, and the PJ had a locked TC beside it). Player was Build blocked area when they looted. Also had a player open Tankie's pumpjack and they could loot both containers there as well.
Server: Scourge