Hi everyone,
I'm looking for a bit of feedback if you'd be so kind. I am currently in the throws of putting together an independant horror movie with a friend that we are looking to shoot. I have written the script and we have sent it to a professional script reading service for comments etc. Overall the feedback was very good (which is encouraging) however they did raise some valuble points, and some points which we disagreed with. There is one comment however that got me thinking and I would appreciate other people's take on this matter to help me decide on what to do.
Basically the story is about a haunted house (well, there's more to it than that but thats the setting). Obviously with a haunted house there are going to be ghosts. One of the things that happnes in the script (it happens a few times) is that the telephone will ring and the protagonist will answer. There will be a sound of static and then a voice will come through (one of the ghosts) to give him warnings/threats. The people who read the script had an issue with this saying "it seems a little beyond their ghost powers to make phone calls". I initially dismissed this comment but I'm beginning to doubt myself now for some reason. For me it seemed perfectly reasonable and, if done right, could make for some very creepy scenes. I mean it's not as if they are actually picking up the phone and making a call, their voices are just coming through the line.

What do you guys think? Is it too far fetched (within the perameters of a ghost story)?

Thanks for the help.