PLEASE BE CAREFUL!
There have cases reported whereby when tourists revealed their personal information in surveys done on the street, it comes back to bite them when fake kidnapping calls are made back to them.
For instance, the fake kidnapper can first call your next of kin (assuming he gets the contact), pose as someone from the telecoms company and ask him/her to shut off her phone as the network is undergoing maintenance. Next, he calls you, and claims to have kidnapped your next of kin.
Obviously, you won’t be able to contact your next-of-kin as his/her phone is shut off. It can also work in the reverse Never ever reveal your personal information, especially on the streets.