How about reasons to go rogue? Here's one:
When I'm online and ready to hit the Battleground and there's no target listed and/or the guild wants members to hold until a time when I'm not available to play. Especially in the higher leagues, I'm not missing out on all those sweet BG rewards for any reason. Either have something for me to hit whenever I'm ready to hit something, or I'll choose my own targets for my own reasons, and go rogue.
Now, in such a case, who's at fault? Me, or guild leadership that has no target for me whenever I'm ready and available?