A Trap Phone is a way for one person to reach you, and nothing else. You can end it whenever you want, and there is nothing left behind when you do.
Selling the couch, meeting the date, texting the contractor. They get a way to reach you, and that is all they get.
Nobody can find you and nobody can request you. The only way in is a link you made and handed to somebody yourself.
Cut somebody off and they simply never reach you again. No scene, no block list, nothing left behind.