And when you click on the link you yourself provided, who is the FIRST company in the first column right in your face?? Yeah, you heard about those guys?
NameSilo provides free Whois Guard at least since I moved my domains out of Namecheap some 7 years ago when my disgruntled employee claimed domains zoned with you are his just because he knew my first name, last name and my DOB. Although they were not taken offline, but certainly froze for a week or so before I wasted many hours to try and clear the situation out. Since then I strongly oppose your "security logic" and proudly had at least 4 people move all their domains out. Although frankly I still have fun locking my ex employee out of his own Namecheap account, simply because I happen to know his username and that's all you need to lock someone out attempting wrong password a few times :)
Anyways, let's end this time-consuming worthless conversation, because frankly you are shooting yourself in the foot.
Edit: from the link you provided and clicking on NameCheap name, did you read the February 22nd review about deleting someones 75 domains and not even having phone support to discuss the issue?? Jesus man; how do you sleep with yourself knowing how much stress you have cause another human-being?? :facepalm