Yep in Montreal, we have the same thing with the legal fight vs illegal. These days almost all the murals done during Festivals have received a little graf as a Christmas gift :
I checked Mainstyle.org, very good stuff but my German is more than rusty but I can look the pictures, great stuff, I like this one with Tom & Jerry :
Poor Jerry ! :-)
We did meanwhile as well a audio interview for our show at Radio X. The podcast is in German, but I wrote it and translated it into English. This guy is just awesome and a legend. In a few weeks their book about Frankfurt-City-Graffiti-History will be published: https://vagabundler.com/photographer/mainstyle/
Thanks for the link... Very long interview, as I'm little sick, it'll make good reading in bed :-)