[Bender]

but what is the alternative

If an app can be installed on someones hardware without their intervention launch it into the air and use it for target practice. If a website requires some crypto-crap to verify objects were scanned then upload to smaller platforms and let others link to the objects from the big platform. The big platforms can play whack-a-mole removing links, it's a fun game. The smaller sites can give the crawler alternate images. Better yet just use small semi-private self hosted platforms. Even better yet ensure those platforms are only accessible via .onion domains requiring a browser that is Tor enabled. People can then make sites that proxy/cache objects from Tor onion sites to easier to access sites.