One of my previous companies (in the US) had a policy of escorting you to the door immediately if you told them you were leaving for a competitor. In practice,

One of my previous companies (in the US) had a policy of escorting you to the door immediately if you told them you were leaving for a competitor. In practice, we usually took them out to lunch, had a laugh about it, and all but one of us came back to the office.