I am doing a school project on bad shop signage, and that is a huge area, since almost every shop sign is terribly designed (At least i southeast London where I live).
I have been collection research material in the form of photographs of several hundreds of signs, which I have analyze.
I have created a list of certain errors that are often seen in shop signs. I have my own thoughts on why the errors are errors, but I am sure that you guys know so much more about typography than me.
The list is as follows:
Use of capital letters only
Use of 2 or more contrasting colors - Red, blue, green, yellow
Warping effects - you know those wavy effects etc.
Use of clipart
Use of shadow effect, outline/stroke effect, and diagonal effects
Wrong letter spacing/word spacing
Maybe you can contribute to an explanation of why these errors are actual errors. I know the obvious reasons but maybe
you guys have a different take on it? I am waiting in excitement :-)