I'll give this one a thumbs-up for the weirdness factor, but it didn't really do much for me otherwise. Perhaps, if viewed around the time of its release, it might have been a seen as somewhat edgy, depending on the viewer, but by 1989 I had already done a bunch of the stuff suggested in this movie, so my guess is I still would have been bored by the thing even then. So, with that said, let me suggest that you DON'T do any of the things they describe in this film, as they are almost all completely illegal and were still mostly illegal in 1989. You can't use the US Mail to harass people--it's a federal offense. Harassment by phone is and was also illegal (we learned that one the hard way!), and pretty much any attempt to wreck someone's life involving the legal system or financially using fraud or deception is a crime and, when you're done getting busted for that, you'll get the pants sued off of you on top of it. And so on.
As previously stated by other reviewers, the delivery of the actors (and they are actors) is deadpan serious, but it isn't outrageous enough to be funny and is just mean-spirited at best and downright juvenile and stupid at worst. Given the banality of most of the tactics described, my guess is this whole mess was something fast and easy to throw together to make a quick buck. If not that, then why? Linda lights up everything she touches, but even she couldn't do much for this wreck.