Frameless Band Posters
If you’re a teenager living with your parents, then hang as many frameless band posters in your room as you like. But if you’re not, then never do that in your living room. If you have a rare poster, then frame it then hang it.
Tacky Glass Tables
Glass tables were tacky decades ago already, so why would they be any better today? Other than being a safety risk, glass furniture is just not a good choice. Any other material coffee table will be a better choice.