Comment: Controlling front door encounters

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Controlling front door encounters

I'm looking for good suggestions on controlling front door encounters. I'm thinking anything from locking glass storm door to outside intercom system. Other ideas and specific products that work well for all members of a family? On a related note, for those of you that have utility boxes that need to be accessed by techs, is there a way to control this without having to keep your gate unlocked alot? If the box were towards the front of the backyard, I would consider building a separate gate/fence but the box is the back so not feasible.