It can be difficult, it can be frustrating, it can make you rage quit.... wait what were talking about again?
The storch, oh yeah! It's a fun little diversion sometimes. GV guys sure appreciate the hot meal and supplies I drop off.
As for visibility, meh, sometimes they are hidden in the trunk of a tree, but persistence and an equal level of ingenuity can discover those camo-netted, predator stealth tech stealing, sons-O-guns... Film viewer is cheezy, but so are invisible ground vehicles NOT in a forest. Sooooo… there's technically a counter mechanism already in play, albeit a game-pausing one.