Maybe "abusing" is the wrong word, but... like a lot of new users do, I come here and look around, if a new challenge is out, answer it as quickly as possible, only to find out that sometimes a challenge gets very high quality answers in a short time.
We all know how it works: that challenge has been in the sandbox for some time, a lot of "expert" users have had the time to prepare their answers, and post it as soon as the challenge is "promoted".
I think this can be unfair to new users, but actually I don't know how I would solve that. Any suggestion? Or maybe it's not a problem, and anybody should be free to do as they want?