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Also, most likely all URLs would end up coded like https://go.to/abcdef

Edit: just found clicking go.to redirects to flock.com.

What if the data is human readable but the error correction is only machine readable?

There still might be room for scams if the error correction is too clever, maybe it could only be a checksum?

So what happens when someone makes an image that appears like one url but scans as a different url? goDgle.com?

Then that is a failure of the protocol