Hypnosis isn't harmless. Even though the files we use tend to have descriptions from the tist and occasional recommendations from other subs, most of us have probably been surprised (at the very least) by the effects a file had on us.
Then there are files that are flat-out dishonest and use a trance to slip you suggestions and commands you don't want. The saying goes that a hypnotist can't make you do anything you're uncomfortable with, but they can make things seem a lot more or less pleasurable than they normally appear to us. That's more than enough.
Files like these are dangerous enough to deserve a thread where we can keep track of them.
Pic related, it's an Emily Astrom video that uses a decent (for once) induction before trying to program the sub to vomit whenever they watch her clips without paying for them.