well, if without speaking to the parents based on the clear evidence of "AMerican PIE" and your knowledge that they will be on the street - despite yet no conversation taking place - sounds like you have made up your mind.
No such thing as easily led in my book - we each are responsible for our own actions.
it is in that light that i would show my children that i would meet with the parents. if happy allow the sleep over. go and check on them periodically.