Tracks you with LSO cookies and "news" articles are at best liberally slanted, at worst a thinly veiled attempt at yellow journalism. MSM at it's worst.
Spam domain list. When I signed up on Yahoo! I started to receive a lot of annoying spam and hoaxes. Download SpamFighter in Spamihilator, or create e-mail account on one of the services (Hotmail and Gmail may be excellent) and use it if you sign up for newsletters. Services that offer temporary e-mail addresses of limited lifespan can also help.
A new welcome to Yahoo. The new Yahoo experience makes it easier to discover the news and information that you care about most. It's the web ordered for you.