As a neutral platform, BitShares will enable people to network and collaborate with others more effectively. I don't think there's a need to cripple it just because some people may use it for things of which we disapprove in the future.
Keep in mind that even the most dreaded "assassination market" application of prediction markets is just as much an opportunity to crowd fund the defense of the person as it is an opportunity to crowd fund the assassination. At its core, this is a fundamental question about the aggregate nature of humanity. If you think new technologies that increase human productivity are a net negative because they enable people to produce more misery and suffering, this may not be the community for you. If you think that technology and increased productivity is generally an improvement and leaves people better off, then check your paranoia and have some appreciation for what this community is building for human empowerment.