Do not put banners on the app that when accidentally tapped auto sign you into drafts
Please make sure you ensure a person is actually trying to enter a league. Especially if you make it impossible for them to leave the league. Somehow while checking my fantasy football account in the app this morning, I accidentally entered two separate basketball leagues. I don't even watch basketball and now I am stuck in these leagues, notifications and all.

The league that you signed up for is referred to as an "Instant Draft." This means that you're automatically placed in a Public league once you enter the draft lobby. Once the draft is over, it's not possible for you or Yahoo to remove or transfer your team from the league.
We apologize that we can't be of more assistance, but do know that you're not obligated to visit the team pages for the entirety of the season. You can disable email notifications (https://help.yahoo.com/kb/edit-yahoo-fantasy-team-yahoo-account-info-sln6128.html) for your team if you'd like. In the Yahoo Fantasy app, you can either hide your league from the home screen if you are using an iOS device or customize league notifications using the steps below.
Hide your teams:
-Tap the Profile icon at the top left.
-Tap Settings.
-Tap Customize menu.
-Tap Hide next to any league you want to remove from the home screen.
Customize notifications:
-Tap the Profile icon at the top left.
-Tap Settings.
-Tap Push Notification Settings.
-Tap the league you want to customize notifications for.