The "be nice" portion of both Matt's and Simon's posts were quite evident; note the opening use of the word "please" in both of their responses. "Experienced" forum participants, in this instance, were at least nice enough to respond with a polite request, and "sophisticated" enough to do it publicly so that other unwary newbies can also glean the benfits of their polite request. In technical fora outside of DH, newbies pulling a multi-post are often flamed to a crisp by regulars and sometimes even given a couple of weeks "time-out" by grumpy admins - NEITHER of which occurred here.
There was absolutely no "policeman-like" action taken, and your adjudication of "control-freak" is likewise completely unjustified, not to mention violating the "Be nice!" clause within forum participation, so "pot, kettle, black" for that notion.
Multi-posting most certainly is inappropriate (whether a written rule or not) in ANY technical support forum, and politely requesting that it be avoided in the future is in no way out of line (publicly or privately), especially considering the amount of help I see rendered by both Matt and Simon within the confines of these fora.
And so, I have one tiny bit of non-technical advice for you and "aussieagility":
And possibly a bong-hit or two, if you're into that sorta thing.