My company does that with phones and computers, I'm more hesitant with third parties.
I can understand that but the way things on the Net are set up now it’s hard to get out of it. I like for them to use my cell phone number because I get any warning or notification immediately. Not too long ago somebody tried to hack my eBay and PayPal accounts on the same day. My cell phone was going off like mad until I went to both accounts and changed my password. The hackers couldn’t get by the other security measures both accounts use so I had enough time to get it all changed. Since somebody tried to hack it both eBay and PayPal added another layer of security for me to get back in if I get locked out.