I thought about that, however, calling Kohlcash "cryptomining without consent" wouldn't even be a stupid reductionism, but plain old disinformation.
Cryptocurrency is one practical application of proof-of-work (hashcash, which was originally devised to stop mail spam), but not all proof-of-work is crypto mining. The source code for Kohlcash is open, it's a simple brute force that does not provide anything at all for the server owner. And it never just "starts mining", you need to inform your consent not once, not twice, but on three different occasions: completing a text captcha, then clicking a link which takes you to the Kohlcash page, and finally clicking a button on that page which starts the PoW.
In that sense, it's no different from Komturcode, except you take matters into you own hands instead of waiting on IRC for several minutes to a few hours.
I don't think Ernst could deliberately spread disinfo, and he is not a Tor user as there is no whitelist process for Tor on this site, so I assume he must be referring to something else.