I'm pretty sure the user here who is harassing their ex and his current gf must be lying about what the police said, or, more likely, heard what they wanted to hear, not what was actually said. I guess the police have dropped the case because of insufficient evidence and because their ex is allegedly also playing a part by messaging them, not because the cops "understand" the situation. A lucky escape means: "lucky you he messaged back with sexual stuff so it's not clear cut harassment" not "what you're doing is correct, keep on going".
God this situation reminds me so much of the 4chan story where they were egging on someones stalker. The way this user talks and just doesn't understand AT ALL how their actions are wrong is just so so similar to this dude. Everyone else is wrong, everything is justifiable, they are only doing it for their victims own good, their moral codex is the only thing that counts, their own feelings come before everyone elses, etc.
If they were a decent person they'd stay away and NO MATTER WHAT they'd stop interacting with them. None of that fake "she needs to know" bull. They just enjoy the power they have over other people by constantly messing with them. Imagine being stalked and harassed by someone for five years while the stalker still thinks they're doing something right. It's horrifying!