I don't speak on behalf of zkSNACKs. As for my personal opinion, I do not care if my coins are joined with any other individual, but since I haven't been inconvenienced by any blacklisting myself, so I don't really have a reason to complain. However, there are people who would opt out of using privacy tools if those privacy tools would "provide cover" for criminals or cause them to "inherit taint", so some would consider this superior service:
It's just interactive coinjoin versus non-interactive coinjoin, so what is the big deal about taking about its use by criminals. As far as I know, there's nothing stopping them from using Wasabi Wallet for anonymity purposes - as blacklisting is not implemented yet (and even if it was implemented, it cannot prevent a tumbling of coins derived from a hack if it is not reported quickly enough) - just as they are using non-interactive mixers for this purpose currently.