This would be so cool, but it seems like it would only be possible in some places. Pretty much my entire state wouldn't be able to do this due to a combination of limestone letting water through and ungodly amounts of radon.
Also the no-sun depression would be absolute hell unless special attention was paid to it.
"Quantifiable harm" might be a distinction to draw here. There are immediate, obvious, and potentially life-long physical complications from a jack-ass style competition that are literally physically tangible. There is no arguing with "Little Timmy's ball got kicked off and he's going to be a eunuch for life." The 'harm' caused by children attending a story time with a drag performer isn't quantifiable in the same way.
Shocked no one said Chainsaw Man yet. I just finished the anime (no manga spoilers) but it sure ain't going to get better...