List of Anti-Piracy measures by game

Here's problems that happen on illegal copies of Theory games or spin-offs that you wouldn't find on legal ones.

The Theory
Supernanny: Theory of Nicole ~ Crashes on title screen if pirated

Supernanny: Theory 2 ~ Does not start up

Spin-Offs
Sophie the Otter: Tough Girl ~ A Japanese child's voice, possibly Toshio Samo's says "Pirate! Pirate! Pirate!" in Japanese in a loop until the final boss, where the game will crash with a black screen

Reicheru the Yokai Spirit: Abusive Fall, Concerned Rise ~ Game freezes with an error message of Reicheru's corpse

Another vs. Normal Party ~ Hangs at title screen (on 3DS) or freezes when appeasing Another Kazuki (PC) due to the bugs.

Kodomo no Kara Sasayaki: Evil Whisper ~ Locks up with an image of Toshio's Shadow plush, with its stuffing on its torso, viewed from the side, as it was disembowled, with the message "This game seems to be an illegal copy" in Japanese.