The symbol of the Skull & Cross Bones did not originally stand for poison. Unfortunately, today it does because the powers that be in the world are trying to cover up its true meaning; this an effort to keep the masses down, disempowered, and ignorant as to the true nature of human existence....

THE TRUE MEANING OF THE SKULL & CROSS BONES IS:
– Symbol of our passing mortality – Reminder of how quickly time passes, so you should “Seize the Day” as we will be dead soon – Call to enjoy life – Though death will come, we will survive death – We are death and we are life, we are an eternal god in this moment (and every moment) dreaming that we are alive on earth. The god is the reality, the life here on earth is the dream.

From what i know..its just a symbol pirates use to scare other ships. Pirates of old are deadly and gamble with life as if its a change.. So killing also is nothing to them.. Sometimes they hang real human in place of the skull symbols.. My findings though

It means beware,or else kowe yio ke(death is lurking near)

There is a deeper meaning behind the skull & crossbones. The symbol has been used in different ways over time, from skulls representing death to representing freedom. Need to follow this skull rings and manage their helpful ways design of rings. It could be used to represent life or freedom from it. The picture above shows this symbolism in another way, as interpreting it for a variety of situations.