Whenever fans develop strong feelings for a pop culture character they start to feel like that character can do no wrong, because every choice they make and action they take is just character development.
But if you put the fan feels aside and actually look at what these characters have done during their storylines they start to look like really bad people.
Characters like Spike from Buffy the Vampire Slayer and Angel started out evil, and made no bones about their allegiance to the dark side, but there's evil and then there's staking your own mother evil.
Spike is scary and all, and I wouldn't want to be on the wrong end of Tyrion's crossbow, but sometimes the scariest and most dangerous characters look like harmless dimwits.
See 10 Favorite TV Characters Who Are Actually Very Bad People here
How about every cop in every police procedural series? They often violate other people's fourth, fifth, and sixth amendment rights, and sometimes are even glorified by the show for doing so. I mean, every cop in Law & Order has had evidence thrown out because of such violations. In CSI, NCIS, Castle, etc., the cops would fake hearing violence or smelling drugs inside a house to enter it without a warrant.