At the moment every other post seems to be spam maybe a good idea to stop new user's posting links till 5th post maybe. Or use a better spam prevention plugin like Anti Human Spam.
Hmm. I will look into this. We are using http://areyouahuman.com/help/english.html and it was working quite well for signups. Will add another layer to combat spam. Not sure what yet. One of these most likely. https://www.google.com.au/search?q=...l5.1863j0j4&sourceid=chrome&es_sm=91&ie=UTF-8
