Guild Wars 2

Excuse the repost, but ticket support suggested to add it here

Hey There

Some ages ago you’ve fixed Guild Missions, so that multiple guilds can get reward for the same active Guild Challenge.

Though I’d like to introduce a problem:

A group of 20 guildies heading towards a Challenge.
Among this group there is 1 player who is new.

There is already an challenge active, which is gonna end within 30 seconds. We’re all waiting nicely till it ends so we can start our own.

Our new player however wants to help the other guild in the final seconds, so he hits a few monsters.

Result: Guild Challenge Completed
1 Player gets reward, 19 players don’t.

Can we get the option to accept / decline credit on Guild Challenge aswell?!

p.s.
Once that is taken care off, any chance to make the highest ranks decision overwrite those of the lower ranks?