An option to turn screenshot notifications on/off.

In the game options menu, there's a check box that says "Show dialog after capture". There's also a checkbox on the popup box itself, that says "don't show this dialog again.". So, we can already shut that off.

Are you talking about the notification that pops up on the upper right? Where notifications already pop up for everything your Sim does anyway? If that's the case, then what you want is notifications in general to be toggled off, not specifically just screenshots.

I would be all for a notifications toggle.