essentials/Essentials — pull request #67 by jb-aero (2012-05-02 16:54:31+00:00)
Title: Only change the gamemode of one player per command.

Using a For loop with matchPlayer causes the command to match every player on the server. Discovered when an admin newly given creative access on my rival server tried to go creative with /gm 1... and instead gave everyone with a 1 in their name creative. Since he didn't know he could just repeat the command to fix it, things just went from bad to worse for them.