Lots of good advice on here, but honestly don't let it scare you and make you paranoid. It's people just wanting to remind you to go in with your eyes open and a bit of caution. I think triple5's advice about people who take it all the wrong way and grow resentful is right, and something to be careful of. A good book if you've been to Thailand is "Private Dancer", but I'm sure you know already that Thai and Pinoy are completely different cultures.