Satan, i think Satan is name for devil or something evil. If this is so, then Twilight films are not. They are just about love and fantasy, i have not watched them all. There are people who love them, there are also people who consider them boring, but one thing for sure, they are not about evil or promoting evil, so not about Satan.
Some hardcore religious types (no insult intended) believe that satan influences society, especially our youth, by secretly indoctrinating us into damnation through popular entertainment. Harry Potter, Monster High, Twilight, etc. are all included. The idea would be to gradually desensitize us to blasphemy, devil worship, etc, and make it popular and "cool". Hansom vampires and muscular werewolves would help accomplish that. But everything I just described is bulls***, bc satan does not exist. And people who claim movies are satanic are idiots who obviously enjoy watching television shows like "Here comes honey boo boo".
Depends on what you see, it's all about perceptions, if it involves what can be considered wicked, or evil on a continual basis then it could be disturbing to some or influence some, especially kids, but to each parent they have that say, not me. as far as the devil goes, his greatest deception to mankind was to make them believe he does not exist.