We can't even stop those people who are abusing bitcoin for real. Because they are loving the way they use bitcoin for their bad plans and doings. But let's just forget those people who are involved to such activities and instead of talking about them, let's just all together work for the good of bitcoin and use it for our own good and needs.
No matter how some individuals use bitcoin, because bitcoin is the only currency in the world that is untraceable which means it is not under control of any authority and that is the reason why it can easily be used for bad things as well, but for sure there are more good users of bitcoin than the bad ones.