Do you really need to harvest seeds? Any respectable weed should replant it's self. I'm finding the strangest things growing in my string bean pots, and those have hardware cloth around them to keep the ground squirrels at bay. They are so prolific I need a tiny electric fence around my raised beds, or they eat everything as soon as it sprouts.

We're flying electric helicopters on Mars yet you can't turn on your clothes dryer in Texas. That's because scientists are in charge of Mars, and Republicans are in charge of Texas.