I guess it just has to be tested. However, Fastrack switches have a very small DC motor to activate the switch tracks, so there are no "magnet coils". If you can run a locomotive around with a motor, it would seem these would be similar.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .