Since I was a kid and first started seeing garage/yard sale signs popping up, I had to wonder what some people were thinking with the crappy home-made illegible stuff they were slapping up. Did they think that just maaaybe 2 inch letters MIGHT not be visable from two feet away let alone 20? Was the goal to communicate the whereabouts of their junk sale or cause car accidents? And did they give any thought at all to the materials they used vs weather conditions? Let's face it - that sign has one goal and if it can't be read it's just a piece of litter tacked to a post.
It's gotten better over the years with the availability of commercially produced signs but, ya still gotta wonder some times.