You can but it's dangerous. You want validation from your idea to come from who are truly likely to be your customers. Also, the setting creates more bias to answers then what you'd want in a good customer development process.
This is a great place to ask about how to go about good customer development and I'd be happy to help in that area. Look at my other answers around these topics as they might be helpful to this question as well
Answered 9 years ago