When someone posts a Fritzing picture and calls it a schematic, I respond like someone just ran their fingernails across a blackboard.
Fritzing pictures are the Lego toys of circuit designs. Practically useless to any engineer, and when posted, many frequenters of these boards won't bother to convert them to a real schematic that they understand.
Here's an example of a really useless Fritzing picture:
Here's the same circuit drawn with Eagle (free version):
There is a potential problem in this design, but it only becomes obvious in the real schematic. Unless you know the Arduino Uno well, it doesn't show in the Fritzing picture.
This is why schematic drawings are preferred. It doesn't have to be done with a program like Eagle; a hand-drawn schematic on an envelope is preferred over a Fritzing picture. Especially when the circuit design may be the problem we're looking for.