Is a 50mm too tight for street photography?

Here is what the site says about that.

From Street: Street: Street photography rewards a camera people don't notice and one you can shoot without thinking. Small and quiet beats megapixels every time.

From Street: A word on people: Laws and customs differ between countries about photographing people in public. Be open about what you're doing, smile, and delete a picture if someone asks.

Quoted from this site's pages.