Hello! I have temporarily disabled the Workshop for People Playground. Nothing has been deleted.
A malicious addon has spread itself throughout the Workshop. For now, I can't say with absolute certainty what this mod has done, what it does, how it does it, or any other useful information.
What you should do
Update the game by verifying game files
Go to your game directory and delete the "mods" folder.
Go to "Steam\\steamapps\\workshop\\content\\1118200" and delete the folder.
Unsubscribe from mods that were updated/uploaded after January 30th.
If you have any uploaded mods, check if they were recently updated without your consent.
What I'm going to do
I'm going to talk to Steam about this and see what can be done. Ideally, the Workshop will be restored. I will work on a patch that should prevent this from happening ever again. It's unknown how long this will take. I am very sorry for all of this. I'll post an update once I have more information.
EDIT: Update
A patch has been published that should keep you safe. The Workshop remains disabled until I get a response from Steam, though.
EDIT 2: wuh
The mod does not destroy your computer. It removes your Contraptions folder, which is extremely sad, and a bunch of other PPG related files. Also, if you have created any mods, it replaces them with itself. This is how it spreads. If you have updated the game to the latest patch, all of this will be prevented. The Workshop remains disabled.