I use maximus to force applications to open in a maximized window, as suggested in this answer.  However, Pidgin message windows are not affected. When I start Pidgin, my buddy list doesn't appear  and my automatic group chats start, but they appear in the top left of the screen, not maximized.
How can I get Pidgin chat windows to start maximized?  Can I add/modify the Pidgin gtkrc file?
 I found it the simplest reliable solution of those given. It didn't seem to work 100% in 12.04, but targets 99% of windows in 13.10.
 By choice. If I do allow it to appear on startup, it will appear maximized.
 I'd prefer not to switch to another maximizer, unless it is as trivial to install. Devil's Pie, while very flexible, requires configuration. As a last resort, I considered installing DP just to make a Pidgin rule.