The way these sites work, they play the safe harbour card; they immediately follow up on DMCA or other copyright requests and remove anything that's reported to

The way these sites work, they play the safe harbour card; they immediately follow up on DMCA or other copyright requests and remove anything that's reported to be copyright infringing without much hesitation. However, since there's no central directory or search facility like on YouTube on these sites, it is a bit hard for copyright owners to find illegal copies on these sites in practice. As they don't keep any logs of downloads, it's impossible to find the people who download copyrighted files from these services. While (due to my job) I'm on the side of the "evil copyright holders and their cronies", I can't help but be amused by the creativity of some people when it comes to coming up with new creative ways to illegally distribute copyrighted material.