It does spook people out around you. When I changed a precognitive dream, I put a triangle on a person's forehead to tag the dream using dream control.

When the dream came true about 3 weeks later in waking life, I found myself in that exact scenario except for this time I was now going through the motions of the dream as it slotted into continuity and the triangle appeared on the person's forehead. He was behind a concession counter working and I was on the other side and he had no clue what I was doing other than he felt something energetic happening to his head.

He asked me what I was doing and I told him I put a triangle on his forehead and he laughed, there were other concession workers there who were female looked at his head saw it and freeked out. So he runs to the bathroom to see a mirror and then comes out freeked out.

So it can scare people for sure. Hence why I don't target people in my dreams for any reason but then I don't need to meddle with that level of change but did more than just that one as an example.

I should have some pics of it on here towards the bottom of the page.
[link to youaredreaming.org (secure)]