Yea. But I don't think you want to forage them from any chemically treated property
You can buy them at many markets. The ones with the red stems always seem to be more tender than the ones with the white stems. From what I know, the commercially grown ones are harvested before the flowers appear - that's when they're less bitter.
Trim off the stems; boil them with plenty of water until fully cooked (tender); drain; and season with oil and vinegar. Enjoy!