No I cannot say I have done any of that. How do you know you are communicating with deceased friends, relatives, or ancestors and not something malevolent pretending to be them?
You know this intuitively but ultimately, yes its completely possible to get tricked. I have my spirit guide stand inbetween me and the spirit world as a bouncer. My spirit guide has come through for me in ways a malevolent spirit, to my assumption, couldnt or wouldnt.
How do we know the helpless elderly guy by the bus stop isn't a serial killer with a 10 inch butchers knife up his sleeve waiting for you to turn your back?