Thanks for pointing out that issue, in Wasabi Wallet 2.0 you get warning signals in the spending menu when you try to spend coins with anonscore 1 (together with higher anonscore). This is a user error that can't be avoided by the protocol (other than implementing whale rounds). The same can be done for my coinjoin.nl coordinator rounds, as there are few participants there are lower privacy guarantees. That's why I try to gradually increase the minimum number of inputs required as my userbase grows.