Chen Guo looked a bit dumbstruck. She didn't understand it too thoroughly, but after seeing the two follow-up posts, she got a clearer idea of the whole picture.
Blue Brook Guild's action had been forced. With the proof post, even if the guilds knew that Blue Brook Guild hadn't done it intentionally, without any concrete proof to back up their uninvolvement, they didn't mind putting the blame on Blue Brook Guild. This type of attack was much more valuable than a PvP match in the game. Blue Brook Guild had a Club and a team behind them. Such an existence made up of three entities would be extremely difficult to harm through just PvP alone.
On the other hand, revealing a scandal could weaken the popularity of one of these three entities and could be considered quite a heavy blow to their reputation.