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Open the URL, I self-hosted a zip file with 9 photos so you don't have to visit a website that's filled with ads.
http://rentingcrisis.nz/forum/images/chalk/activism.zip
I wrote in 20 locations around riccarton and ilam. Most of my chalk was on riccarton road or perhaps 50 metres into a side street.
Please share this file.
It fails to upload as a comment and I'm not going to resize every single file (assuming that's the issue). Sorry if you're on mobile and don't have a real computer.