That was my experience also. Everyting has to be locked up and if left on the streets after dark will probably not be there in the morning. Even the places that store your car or bikes will steal them but still better than leaving in the open.
People were nice, like the Thais 25 years ago, that saw us as superior for better or worse. Don't want to be alone though off the beaten path. I found this out the hard way and barely escaped without being robbed.