My dear friend you have right a very good post and the most important thing for scamming to know is never share your private key and this is I think the keyword in your post.

I rememberd once I give my private key to someone and then I suffer a lot so the most important thing to secure and prevent from scamming is never share your private key with anyone so.

In a very interactive way you have given all the answers... I have participated in this contest as well do check my post as well