Reina --
The problem isn't that sites in other countries don't have to comply with the DMCA. In fact, neither do sites in the US -- its a purely voluntary step that protects sites against copyright infringement lawsuits while at the same time offering an easy way for content creators to get infringing content removed.
Nobody HAS to comply with it.
However, there are some good reasons to do so anyway -- not only does it protect you against lawsuits, but it also shows that you're committed to respecting copyright. Given OpenSim's bad reputation in this area, we should be doing all we can to encourage the use of legally licensed content.
OpenSim Creations is a leader in this area, offering a wide selection of content by original creators with Creative Commons licenses. I'm a huge fan of what they do, and have contributed to the site, and regularly refer people to it.
But the lack of a takedown process that doesn't involve international attorneys -- and their legal fees -- is a major step backward for copyright protection in the OpenSim community.