I become upset when see all these construction signs all over the world that are left after hunting. And I see several problems there:
1. Construction sites everywhere totally ruin atmosphere of the game.
2. This kind of hunt with blocking animals seems like cheat and makes hunting too easy.
The problem can be solved by making construction sites passable.
Another way is to let them decay. There were some topics about this problem:
viewtopic.php?f=5&t=11142&p=119944&hilit=construction+site#p119944
and main argument against this idea was that construction signs are used as stockpiles. It can be solved too - for example, construction sites can decay everywhere except of claimed land.