First and foremost, this is a public forum and he has same rights to post just like you. You can't ask him not to quote you, if his quoting bothers you, feel free to use Ignore button located at his profile - it will stop notifying you about his quotes and auto hide all his posts.
I honestly don't find anything wrong (or childish) in his post which disturbs the forum decorum as you mentioned. In fact i find your post written in a rude way, where as DJ bro's post has nothing in even little rude tone.