If all the schools are closed then they also need to close all the places where children will otherwise congregate when their parents wonder what to do with them all day every day, eg. soft play, trampoline parks, theme parks, leisure centres, coffee shops, libraries, actually all shops.
Because no parent is going to keep their children at home the whole time, are they? Then, all those people who are more likely to suffer with the virus, and who perhaps usually don't come into contact with children much as they're usually at school, will suddenly find an influx of children all over the place, all day, every day.
I'm not sure sending all the children in the country out into the world every day is going to help stop the virus.
How many of you who've signed will keep your children home to help prevent the virus spreading? Really?