Even if its not necessary satanic ( only antichristian symbol or a St Peter cross, crucified head down as an humility mark toward the Christ which isn't satanic at all) I don't get exact point too, maybe its used as a pagan symbol, as many people do, refusing the christianisation of pagan cultures such like nordic chamanism or celtic druidism.
With all due respect, but everything you wrote is exactly what Satanism is, as well as all the pagan religions, whose creator is Satan himself...as you can clearly understand if you carefully check into Bible, anything what is said, expressed through symbolism or done against Jesus Christ or His Church is satanic by default..in The Bible, our Lord Jesus Christ clearly said: "He that is not with me is against me!"Matthew 12,30....God bless you!
unfortunately, I had to agree with you, because that is exactly what satan wants from the people...to live their lives without any deeper meaning, without a crucial truthful knowledge about their Creator and Savior - Our Lord God Jesus Christ! ..my dear friend, if people wants wisdom about how to live their lives, The True Wisdom is a Gift and property of God Himself, and God is willing to give it to anybody who seeks The Truth - Jesus Christ, with whole humble heart!God is Love, and Jesus Christ is The only Truth, Way and Life!
These symbols are by the way too often used for a superficial purpose, like a provocation with no deeper meaning.