This is part of the reason I was hesitant to start playing shadowverse. My parents set my older brother's pokemon collection ablaze when he was a kid, and they set my MtG cards on fire about a year ago. Even playing something like "Warlock" in HS is risky, because they think that I'm practicing "Witchcraft". I can imagine having a sexy demon would be worse lmao. But at a glance, HS is much less conspicuous than Shadowverse. Usually you don't have enough time to read the card texts as they're being played, but in Shadowverse, they would probably get suspicious by just looking at the icon itself. But thankfully, I can usually just Alt-Tab when they happen to walk in, or just quit the game.