Google Safebrowsing is the main one picking up something they think is bad here:
https://virustotal.com/en/domain/joburg.org.za/information/
Considering the wide source of their net, even at times stumping people in the IT security sector with them asking why. Google is not very good at sharing reasons, but to only be proven correct later.
Like Google or hate them, that's irrelevant atm. I'd be very cautious.