I'm no any game developer or IT expert, but when players reported an exploit used to gain advantage, they took it down and fixed it. Remember Vertigo? Nightstalker Quiever exploit? Sunbreakers with ≥10 hammers? It is unfortunate the log book is bugged, but exploting a bug to a person's advantage is just not acceptable. Thorn is OP and not fixed for 8 months? I don't see it as exploit, it is the way the gun perks works. Take Red Death perk as a comparison. Just my opinion.