Not if you put it at the bottom. Yes, it does block the page, but hopefully your page will degrade gracefuly until the js is loaded. If it doesn't, then you wan

Not if you put it at the bottom. Yes, it does block the page, but hopefully your page will degrade gracefuly until the js is loaded. If it doesn't, then you want it at the top, where it will block. It will load slower, sure, but people won't have to see a broken site.