Calls such as these are meant to infuriate or terrify you.

1. As with the milder nuisance calls, this caller may remain silent for a while. Do not give the person a chance to get started. Hang up.

2. If a caller makes an obscene or improperly suggestive remark, hang up. The person would like nothing better than for you to demand to know who he or she is, or to ask repeatedly what he or she wants.