Speaking of misinformation, your post actually isn't accurate, either.
There is more to complying with the DMCA than simply responding to take-down notices and the tube owner/operator not being the one who uploads the content in the first place.
I still see many tubes that have not registered a DMCA agent with the U.S. Copyright office. That's a violation of DMCA. (For those who care about chapter and verse in citations, it's a violation of §512 (c)(2), specifically.)
Under §512 (i)(1)(A), UGC sites like tubes also must establish and enforce a policy with respect to repeat infringers among the users who upload content; many tubes still have not done this.
Also under Under §512 (i), UGC sites must also "accommodate and not interfere with standard technical measures." This is something many tubes do not do.
There are other requirements for receiving safe harbor, as well, but my point is that it seems like you might need to be on the receiving end of a few "the more you know" moments yourself. ;-)
Oh, one more thing: that YouTube case you alluded to?
It isn't over, and the most recent ruling (by the Second Circuit) cut in favor of Viacom, not YouTube.