@Theymos is there a way to convert/anon the data such that it could be released?
You can already reconstruct a lot of the data from the graph with some work. Given a pixel position, you can calculate its /24 address. I'm hesitant to publish the source data because, given that, it's more likely that you'll be able to figure out which data entries I fudged.
I'm not understanding why it is an issue if someone could work out evil IP ranges. The high ones are almost all going to be VPNs and it doesn't identify anyone. The years of data may be useful to others operating other bitcoin services to pre-empt problems before they occur. Regardless, deconstructing the image is beyond my paygrade so unless someone else can get me the pixel data into a written data form I'll have to pass.