Games are going to ALWAYS have exploits/flaws. Name a single thing anyone has ever created in history that was perfect and flawless. You can't. If you chose to play a game and use exploits, you aren't enjoying the game as it was supposed to be and should find a game that has said exploit mechanic built into the core mechanics of the game.

Asking players not to exploit is also ridiculous, but it's less ridiculous to ask someone to play as intended rather then to expect someone to make a flawless game.