To succesfully hypnotise a person, the following factors are
critical:
1) Mental state of the targeted individuals
2) Experiences of the person performing the "hypnotism"
3) External environment where the "hypnotism" takes place
4) Tools involved in focusing or attracting the victim attention
for more than 2-3sec eg a Chain (the most common form use in
clinical hypnotism), or a pictures or some "words" that catches
your attention cycles.
It is best to avoid talking too much to strangers in order to avoid
some unpleasant experiences. If you have read the newspapers, there
are many unsolved robberies related to "hypnotism" in Singapore.
Most of the time, the victims are unable to pin-point the exact
details, thus rendered the police job in hunting down these
hypnotiser robber very very unfruitful.
Ways to counter:
1) be confident in yourself
2) selective listening
3) learn to say "NO" to strangers