and author of articles on how to use the legal system to get revenge on people [googleusercontent.com].
Did you use Google language tools or something to get at that conclusion?
I am not Swedish but as a Norwegian with a very similar language (to me Swedish seems more like a strange dialect of my own language) I can read and understand swedish pretty well.
The link is not about how to use the legal system to get revenge on people, in fact the legal system, police, prosecutors or lawyers is not even mentioned in the article. Neither does she suggest making false charges or anything similar. The only use of the Swedish equivalent for "legal" (läglig) is to say that your revenge must be legal, making false charges is not legal in Sweden and may in fact be punished with jail time.
The article is more about how to be systematic when you planning your revenge by listing your ideas and ranking them by probability of success and that your revenge should be comparative to the offense you want revenge for.
At worst the article is childish and a sign of some underlying psychic instability or immaturity in this woman. The worst thing she suggest as an idea for revenge is to make sure your ex-boyfriend/girlfriend gets a lunatic on his/her tail. That is at least of very questionable ethics and may perhaps be illegal depending on how you go about doing it, but she gives no details at all about how to accomplish such an act. In fact she is very vague on ideas for revenge at all.
I have no idea about the rest of your claims, they may very well be true.