Is it a good idea to use the 62.5% em trick?

body { font-size:62.5%; } h1 { font-size: 2.4em; } /* =24px */ p { font-size: 1.4em; } /* =14px */ The idea is that we're scaling down the root font size so that each em unit is equal to 10px instead of 16px. People like this solution because the...