A Trust Fact!!

From childhood we are all learning that you should always trust the people, Distrust is sin to a man. If you don't trust anyone that means you aren't respecting him.
But really it's true? In real world should you believe anyone? I think, if you trust anyone, if he can understand, easily will take on you , easily will grab you. He will take all the advantages of you. He will always try to suck you until your last blood point. Yeah. I know for a reader it willn't be acceptable. He will try to think himself at that position and will be angry at me. :D.
But thing is that I am trying to say anybody shouldn't be trusted. At that point anyone can raise a thing that we should trust but not blindly. But problem is that in dictionary you can find only two words "Trust" and "Distrust". You can't find any word which implies the middle meaning of that two words!! So either you can trust anyone or not. But whether it's blind or not, you can't say perfectly because it's absolutely relative.
Only I can say "don't trust anyone". If you trust anyone, you will soon fall in a danger and you will be badly hurt.But Reader , it's absolutely my opinion.You may have different opinion.So please don't TRUST me also!! :D