I have played a lot of CTF games, and I've never seen one that allows you to hold your own flag. This tells me Jagex is guilty of poor design, and that those who take advantage of this poor design are not cheating. Personally, I think that holding destroys all other chances at strategy. If your only option it to immediately go with the nuclear option, that's no fun in my book. I've played bad fighting games like this, where you could settle into a series of moves/blocks that would stalemate the game. Thing is, you almost have to hold your own flag, since if the other team holds theirs you're going to be slaughtered. It only works if neither team holds, which isn't going to happen. In the end, it comes down to poor design by Jagex. I just expect that it's on their list of things to fix. Abuse it while you can!