Even if they are “pretending” in order to create opportunity for ridicule, if they should happen to mimic the black mass, it is fooling around with the occult. Not smart, to say the least.
YOU said it. Fooling around with the occult is fooling around with Lucifer. Did you know that "Satan" comes from a Hebrew word?
From Wikipedia
Satan (Hebrew: שָּׂטָן satan, meaning "adversary") is a term, as well as the name of a figure appearing in the texts of the Abrahamic religions who brings evil and temptation, and is known as the deceiver that leads humanity astray.
Some religious groups teach that he originated as an angel who fell out of favor with God, seducing humanity into the ways of sin, and who now rules over the fallen world.
In the Hebrew Bible and the New Testament, Satan is primarily an accuser and adversary, a decidedly malevolent entity (a.k.a. the devil) who possesses demonic qualities.