>>1
Webmasters don't like that. Don't do that.
>>4
Lol slow. You have to do all sorts of clicks and fly through menus and stuff. It takes me a few seconds to type leech <url> <depth>.
>>6
You really need many more parameters if you want wget to behave properly, identify properly (including user agent, language, etc.), don't hit servers too hard, and do not download ads. That's why I like it, casual users will take time using it to leech. I wrote a simple command line frontend for it.