[DoctorOW]

If you're on Cloudflare and they're stripping JS wouldn't a JS challenge be appropriate?

https://developers.cloudflare.com/fundamentals/get-started/c...

[pharmakom]

Pretty anti-user though

[DoctorOW]

Because it requires JS? How about this then...

    a[href*= "sukuns.us.to"] {
     display:none; 
    }

Then use SRI to enforce that CSS.