Why on earth would I ban you? lol silly...
They CAN get clogged and set your grow back, and set your living room ceiling back... yes, my ceiling needs re-plastering now because I didn't check for clogs for a week...

Check for clogs, and clean out your pump filter every week when you change the res. Scrape out any algae that has grown, as it WILL, in the res, at every change as well. Make sure the clay pebbles stay in the pots.

The water flows like a babbling brook down through the hydroton and along the roots. The tray is to hold the pots upright and direct the runoff water back into the res.