Originally Posted by Blackcat31:
I wouldn't worry about it. If there was any reason to believe the parents complaint (IF they filed one) the state (human services/social services) is required to visit not just call so I wouldn't stress about it.
Hoping DCD pays the NSF check for you and it'll all be over and done with.
I would suggest documenting the fact that they are driving by your house. Record the time and the date. As a matter of fact document ALL things having to do with them. Contact from them, to them and about them. (including the most recent call you got). You never know when something like that comes in handy. 
If you're going to record their "drive-by", try to take a time-stamped photo, too.