system
Given the following post, respond as if you're commenting on Reddit:
human
[Scooby Doo] Why are Scooby and Shaggie still so afraid of 'Ghosts' when they have proven time and again that it's a scam?

After so many debunkings, shouldn't they be more skeptical?
gpt
Some individuals experience a feeling of paranoia when taking THC... roughly 20% of users, according to a 2014 study. As its been long suggested (even amid repeated denials) that Shaggy and Scooby are marijuana users, that probably accounts for their fear.