Of course not. Do that, and people will walk all over you.

[Riku knows from experience, even if he didn't exactly trust Maleficent. The fact is, there are manipulative people out there who prey on the naive.]

The only upside's that most of their experiments wear off after a week. Sometimes they're more annoying than scarring, but you can never really tell until you're smack dab in the middle of one.