Yeah, I go work in our big yard and garden (in the summer) and I've taken our monitor to my neighbors house before. Sometimes I FaceTime my iPad (which is watching the monitor) and take my phone with me.
I'll be the lone dissenter and say no. I wouldn't do it. I wouldn't judge if YOU did it, but I personally wouldn't do it. Guess I'm not as breezy as I thought I was...
I did it once at my neighbors house who is two doors down in an attached town house. I felt guilty about it but couldn't think of any real reason not to do it, and after reading all the affirming responses here will probably feel less guilty when I do it again. Thanks for posting OP!