I live in an old Victorian home in a small town in Utah. Every year in the Spring there would be a big Mountain Man Rendezvous in the mountains to the east of my house. I have a friend who always went, but this particular year he asked me for a favor.
He had a good job as an accountant in the city, and he asked to shower at my house so he wouldn't need to drive 50 miles back home to change into a suit. I told him it wouldn't be a problem, even though we wouldn't be home at that time, I would leave it unlocked and he could make himself at home.
When my Wife and I returned to my house, we saw his suit and backpack laying on the ground on the back porch. We collected his things and brought them inside.
I gave him a call at work and he said he would pick them up after work, but only if we were home.
Then he told me what happened...
He got to our house, and walked up the walkway. He got a REALLY creepy vibe, but he just figured it was just because my house is a creepy old house. By the time he got to the door, he was spooked. When he opened the door "I saw the biggest Indian I've ever seen, and he was growling at me like a wolf! I bolted into the yard, and it took everything I had in me to walk back to my car to leave. Your house is HAUNTED and I will never come back unless you are there!"
True to his word, he hasn't been back at ALL.
We always believed there was a Native American spirit in our home. My Wife and my Son can see spirits, and when my Son was little he would talk about an Indian. He called him "Jonie". My Wife has never seen him, but she gets the impression of arrows and horses when he came around. After the experience my friend had, she said she heard a voice saying "Sho-shone!
She believes he told my Son the same thing, that he is Shoshone, but as a child he mispronounced it as Jonie. She also believes he was so angry because my friend was dressed up like a mountain man!
I thanked him, because its nice to know some of them have your back!
I simply don't feel that such an instant leap to alarm is completely justified. The OP should trust his gut. If he and his family sense no threat from this entity then they should be fine.