and someone can use their account when they help them?
No one can create or use an account on your behalf , even with written permission .For your protection you are the only one who can create your personal my Social Security account for your own exclusive use . Social Security is dedicated to protecting the information and resources entrusted to us , including your personal information and investment .
and if we can't get the alert lifted then we won't be able to create an account?
You can still visit your local Social Security office to open an account in person .