Toddlers never remove/change "Nintendo Game Card" properly, are there any possible risks to the hardware?
The toddlers constantly generate this error because they don't exit the game cleanly when they remove the Nintendo Game Card.
Software closed because game card was removed
In German the error is
Die Software wurde beendet weil die Softwarekarte entfernt wurde.
I believe this error message can be ignored since the Nintendo Game Card are read only media. Or am I wrong, are there risks to my hardware and/or games?
The game card itself won't be damaged in any way since, like you said, the data is read only. The only thing to really be wary of is if the game is in the middle of saving or has some sort of auto save function. Removing the game card during saving data could potentially corrupt that save data.