No, I do not want to install your app.
No, I do not want that app to run on startup.
No, I do not want that app shortcut on my desktop.
No, I do not want to subscribe to your newsletter.
No, I do not want your site to send me notifications.
No, I do not want to tell you about my recent experience.
No, I do not want to sign up for an account.
No, I do not want to sign up using a different service and let the two of you know about each other.
No, I do not want to sign in for a more personalized experience.
No, I do not want to allow you to read my contacts.
No, I do not want you to scan my content.
No, I do not want you to track me.
No, I do not want to click "Later" or "Not now" when what I mean is NO.