There a lot of information out there about scams and how to avoid them.
Withing the BTC space there have been many well documented casualties.
It's up to you to keep doing your research and use some bad experiences of others as a sign post for things to avoid.
If you walk around with a sign saying Trust No One, then you're probably still trying to get over a bad experience.
Thousands of people are mining with Pools and it's all based on trust, else the you wouldn't see the level of adoption and interest that Bitcoin has created these past 18 months...