Oh guys, you're really not getting it at all.
In case the Steam software should be used to download each DLC onto anyones computer (and that was the common understanding at the beginning of this thread), even on the computers of those who are just sp gamers and have not bought such DLC, that qualifies as "undesired software".
And any software which puts something onto my computer which I don't want - and about which fact I have not been informed! - is by definition "malware" - just because of this sole fact that something is done to which I do not agree.
The excuse that I once may have agreed to the installation of the Steam software in no way implicates any agreement to the installation of such DLC, as long as I don't have the intention to use it. Since I have not bought it, as long as I stay a sp gamer, I have implicitely stated that I don't want to use it.
Furthermore, as far as I see, up to now it has been nowhere stated that Steam might perform such installation of DLC (unnotified, unordered, thus undesired).
So, either the initial assumption of a lot of people here was wrong:
If everyone has to download dlc it will work.
I'm sure this is the way it will happen.(...)
It doesn't make sense any other way.
(...) making sure all DLC is patched into the games core files so thier is no incompatibility.
I'm pretty sure it'll be implemented the same way DLC has been implemented in every other game. That is, you can't 'use' the content if you haven't bought it, (...)
(and so on...)
or the Steam software will become a means to perform undesired actions on somebody's computer.
Now, I honestly understand any excitement of mp gamers to have that DLC present for gaming purposes, may it even be in a passive way. They are playing mp games and for that purpose, the installation of DLC may be meaningful (although still the question of unauthorized use of the user's bandwidth is open).
Yet, the sp gamer, who has not bought the DLC, has neither explicitely nor implicetely consented to such action.
As far as we know, there isn't even any notification about that process.
And that, you may turn as ever you want, is an interference with user rights.
Please, take a minute, make your thoughts about it and then decide whether you are fine with the fact that such a thing is done to someone who neither wants it nor get's informed about it.
That you personally, as far as you and your computer(s) is/are concerned - ok.
The topic is the one who might not be ok with this.