The reason they need to clean the entire beach and not just remove the offending objects might be that there is a fair amount of uranium glass in there, and maybe they are concerned they will keep reading above ambient levels of radiation without knowing if it's the harmless glass or the dangerous deck lights. Even though the deck lights might be safe to walk around, there is a risk that some of the radium gets ingested by wildlife. If that happens, it might eventually end up on your plate!<br><br>When some more careless people say things like "oh, it's not that dangerous, bla bla chest X-ray bla bla long haul flight"  they are forgetting what can happen if any radioactive material gets ingested, even if it is just a little bit of dust. It's only safe if none of the material enters your body.