Depends where you live. I can most certainly attest to the rising popularity of "vanlife", and the associated downsides of long term unmanaged camping/squatting.

In my case there's a popular area for climbers on a fire road near a river close to me. Many of these folks just shit arbitrarily in the woods, and don't even bury it. It stinks, attracts animals, and makes it impossible to go on hikes. A friend's dog even ate some which had THC in it from someone who ate a marijuana edible. And let's not get started about the risk of forest fires in the dry season.

There are some that are better about managing their waste and overall footprint, but there is an outsized impact from the less considerate.

There are places where these concerns are real and are having actual and increasing impact. Dismissing these concerns is not helpful.

People living in vans/RV and disposing of their fecal matter and urine with unsafe methods is a big problem for many communities along the California coast from San Francisco to San Diego and also along corridors in Silicon Valley based on local news around Mountain View and San Jose. The temperatures are moderate 10 months of the year or more.

Condescending speculation.