Yes, messageboards, etc. should be considered read-only at best on work devices.

I don't, as a SW guy it's part of on-the-job training!

I think one of the biggest risks to the employee is the CEO or anybody in power simply deciding to letting you go and suddenly taking your machine from you without notice while you're in the office.

Or a ransomware invading your work laptop and encrypting your stuff.

Or your creepy IT guy figuring out the stuff you post on amazon or having access to your nudes or whatever.

Try to be careful in avoiding binding your opinion or comment to your employer.