It is also painful when your app gets hacked, accounts get taken over and abused, user data is compromised, and so on. For serious sites it's worth the pain to turn on security enforcement features.
Ok, but be sure to make it optional. Putting 10 locks on your door is great for security, but it's not for everyone.
And instead of this security feature some might want to take a more fundamental look at security which might lead them to a completely different design. Again, make it optional.
