I’ve been an advocate for this since Voice came out. I also advocate for making a spam gmail account (such as myspamemail@gmail.com) to tie the number to. Now if you need to sign up on a website in order to view information, or want to sign up for the 10% discount offer that pops up on the website you are browsing, you can do so without concern of clogging your active email account with more spam to filter out. Yes I know filters work great, but having a dedicated spam email account is probably the best filter you can have in my opinion.