Yeah. I feel like their only option to prevent this is to remove the LN thing completely from Damus. And even then like you said all it does is neuter that one client. You still receive it if that LN address is tied to your npub anywhere else.
I'm not really sure what they are trying to achieve other than outright say your app can't allow editing of the LN address section. Or display anything about "zaps"
But that stops nothing.