I really like the proxy domain registration offered by Njalla. https://njal.la/ With it, there's no need for hiding from WHOIS.
Read this UDRP decision, they found that using Njallas proxy service constitutes bad faith.
While this was a terribly misguided decision, UDRP cases rely heavily on precedent, so it'd be tricky to get this reversed.
Don't get me wrong though, most of the time njal.la is pretty nice and I have tens of domains with them. I just wouldn't use them for anything very important.