I know Thai people really believe in pee (ghosts) and don't try to laugh about it, you will look stupid, sure
I think they believe there are some pee in Rawai (among other areas) and foreign authorities, although they don't believe in it, know how many Thai people are afraid about it.
I don't believe at all in ghosts or surnatural things, but how many movies about gosts have met a real success in theatres in our countries? So how can we judge it?
Just for the fun, if you know a Thai, show him/her this picture and say you don't know who it is, you have just found it on your camera and you think it is a picture taken in your home
Be sure he/she will first think it's a ghost.
It is not a lack of respect, just a joke, so be fast to say it is only a joke and explain it's a bad pic
... but maybe it will be a hard work