For the purposes of this question, assume I am of a legal status which prevents me from exiting the US. If I was to identify myself to CBP, I run a high risk of being denied entry and/or having my status invalidated. I have a friend who I would like to visit, but they're unable to secure a US Visa, though they can secure a Canadian one.
My friend and I decide to meet at the Peace Arch (Washington-BC crossing), and my friend crosses over to the US side of the park, but I do not.
Would it be possible to meet this friend, exchange pleasantries, and perhaps a hug, without technically exiting the US from the eyes of US immigration? Would I have to talk to CBP when I leave the park?