After 6 calls from one particular double glazing sales company asking us if we wanted double glazing (no - we've just had it put in), or a conservatory (we're in a first floor flat!!!) we registered with Telephone Preference Service (0845 070 0707) which means that companies cannot make cold calls to your number. Free of charge and well worth it! (but it doesn't stop the credit card company/bank/mortgage providers calling you to see if you're "happy with their services" and while you're on the phone can I tell you about our new service .....) Front door I can't help with - unless you take the batteries out of the doorbell and leave a message on the front door saying "use the doorbell". :O)