Me be cautious?
Discussion
Yup. There are always going to be people who will try and take advantage of the kindness that you show them, as a means to benefit themselves. Life ain't no fairytale.
How should I be cautious?
Or just be cautious and aware that people do this?
The last one. The point I'm trying to make here is that finding good quality friends is a far more difficult task than people understand.