I found this topic and its now a few months later but for future references.

UPS, and even Fed Ex workers have a rule called 3rd party disclosures.

Basically whatever you see at a customers house is none of your business and is not to be talked about.

Now of course there are those that will "gossip"..

but most big companies would like to avoid the stigma that their company would spy on their customers.

If nothing else call into the local UPS office a few days later and give vague information about drivers pushing thru locked gates and snooping around your property.

When you order stuff that will be delivered in the "notes box" put in message such as... deliver to front door only... or vicious dogs in back yard..

Hopefully all went well for you