These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Epileptic Trees: The Friend. The demon Challenger claims he was an illusion used to manipulate Ghost Rider, but who would believe, well, a demon? To this day people debate if he was an illusion, demon, agent of Heaven, another Hell-Lord trying to spoil Mephisto's plans, Angel, a normal (but maybe not quite sane) guy who just happened to be in the right place at the right time, or even Jesus Christ himself.
Squick/Gorn: The most recent series was filled with it, along with High Octane Nightmare Fuel. As was the miniseries Trail of Tears, with the High Octane Nightmare Fuel turned Up to Eleven. It featured a pair of outlaws that the Ghost Rider killed by smashing them together so hard they fused together. They came back as minions of Hell, still fused together.
The movies:
Acceptable Targets: The overweight goth woman Johnny saved from an attacker; her interview was played for laughs the next night, and not so much because she was describing a man whose head was on fire.
Why is the Rider so incredibly psychotic in the second film? Johnny's been keeping him locked away. He hasn't had any fun in a long time, and suddenly he's been given carte blanche to do whatever it takes to find Danny. Let the slaughter begin!
The Rider's line in the first trailer released on-line also shows that in addition to being completely out there in terms of his brutality, he also has a disturbed sense of humor when he defeats one of the mooks.