Right place, right time, right plant. Don't eat weeds from places where they may have been sprayed by pesticides or pets. I put dandelion (literally "teeth of the lion" or dans de lion in french) in my smoothies weekly. It's pretty bitter and tastes of the earth, so if you make a smoothie use copious amounts of lemon juice and/or orange juice to make it taste a little bit better. There are all sorts of little-known health benefits to dandelion. They are PACKED with all sorts of nutrients. People even grow them deliberately in gardens in Europe. Some people also make dandelion wine and dandelion coffee. Google this stuff - you might be surprised. In an abstract sense weeds are a bit like startups because they take unwanted resources (heat, light, soil, space) and 'add value' through unique processes e.g. photosynthesis to turn them into something else. In a strange way I find weeds inspiring.