group issues

Hi, I'm a big fan of Soundcloud and I love the new group feature. I started a group for Dj mixes which gets a lot of spam (tracks not mixes, re adding sets to appear first on page, people adding 20 mixes at once...) Is there a way to block users or moderate this without me having to approve every single set added. A little control could go a long way!
Thanks
rndms