It's basically asking others to pay for your fun when you ask for money.... And yes, many in here have begged and asked for donations under all kinds of pretenses by setting up websites.
Nothing wrong though with asking for a place to stay during your trip though, Couchsurfing is a website that helps with that. Nothing wrong with getting food from a pantry along the way either. The money part though, you should be responsible for that yourself in my opinion.
And you can do a 4 week tour with just a couple of 100 of dollars.