Spotify should, as a matter of good practice and safety, implement 2-step authentication.
Previously, Spotify enabled the option to log out other sessions other than the current session.
This would prevent hackers from stealing accounts, which would additionaly lead to less account hacks and less work for Spotify employees to assist in these cases.
More info: https://twofactorauth.org
Updated on 2017-08-29
Hey @ThomasVH we've revisited this idea with the teams behind logging into Spotify. We've decided not to move forward with two-factor authentication at this time.
If you're interested in security, we do have some tips to protect your Spotify account here. Of course if our status on this changes we will let you all know right here. Thanks!