That is just unacceptable. In a map that has a high population, to get an event to fail is almost impossible. When it does fail, the crystals are destroyed almost instantly by people who don't watch map chat, or have no idea that others need it as well. For about 4 hours each day, I try to get the event to fail. I ask in map chat, local chat. I pop my Commander tag and try to guide others away, and to instruct them on what the achievement requirements are. Either I am ignored completely, with a "lol ur dumb" reply, or I am listened to; we get absolutely no progress on the defense, and it fails as required. However, once the event sets up for the retaking, the 10 soldiers are immediately freed without anyone having giving others the courtesy of getting in a hit or two for credit.
I understand; achievements are supposed to be challenging. But when an entire map is ready to assist, are all grouped around you, and the achievement requirements are stolen by some random runarounds who don't care that they are robbing others' time and effort, it gets incredibly frustrating. I pride myself in-game for being a mentor, a commander, a person who helps others out, be it in classes, skill management, combo fields, attribute choices, Hero Points, Dungeons, Fractals, etc. I want to be able to help others get this, and perhaps the amount of imprisoned could be increased, or the amount to be freed decreased. In any case, thank you for your time. I do appreciate the time you put into the chapter. It's just the completionist in me that is irked by this.