Facebook Live Stream Pedo busters

I recently had one of these pop up in my feed and I can't stop watching.. There are a bunch of groups (seemingly mostly in the UK and Ireland) that use decoys to set up, document and arrest w/law enforcement what seems like an endless supply of nasty pedos. It seems like they're catching a handful of these sickos every single day... Anyone else watch these?

https://www.facebook.com/PredAlert/videos/331588780581845/