I've heard that in Magic, you're now /required/ to cut your opponent's deck.
Sounded weird to me at first.
Someone then explained to me that it was a cultural thing. Most of us think nothing of someone cutting our deck, but to many Japanese players it was like being accused of cheating.
By requiring people to cut their opponent's deck they bridged a culture gap.
If you always cut your opponent's deck, it will achieve the same effect as it being mandated: you're not singling anyone out.