As an experiment, I did a search for "New Player" in the titles of ME 3 MP Forum, and assuming the link works: Here are my search results.
Now, I can lend some context to a few of those, notably the two at the top, which were not actually started by new players and thus break the chain somewhat. Beyond that, however, you can click through the various threads from people expressing that they are newer and needing help/info/people to play with. They are typical of the results in the forum.
I have to point out that what is happening in this thread is a phenomenon that is the result of very specific forum personality types encountering each other under new circumstances. It is not reflective of how the forums are, at large, and especially not the MP forum. Drama and hostility are pretty rare in the MP forum these days, and even when the activity was at its peak, the bulk of the "big broohahas" are ultimately legendary. People have names for most of them, because they were noteworthy when they happened - i.e. they were not the norm.
There are hostilities and drama everywhere, but the MP forum is actually steeped in its own brand of silliness far more than it erupts in any kind of anger or attacks on people. The truth is, the bulk of the heated arguments and ad hominem attacks that I encounter occur outside the MP forums - which is saying something, considering that it still represents a near-majority of my forum reading.
Edit: the search link did not work the way I had hoped. To replicate my results, put the words "new" and "player" in the search terms, be sure to click on "title only." Then under the forums to search, scroll down through the ME 3 forums to "Multiplayer" and select the sub-heading "Combat Strategy," as it is the forum we are referring to. It comes after all the equivalent SP forums. The first Combat Strategy forum is for SP and should be skipped. The MP Combat Strategy forum is right next to the Multiplayer subheading. I'd skip the first two results, as they aren't actually from new players, but regardless, the response to virtually all of the threads in my results list paints a picture of a forum that is very welcoming to new players.