I mean I don't exactly see stance cars out on the highway often, but maybe thats my area and when I'm awake. I think they're usually more of a project you take to car shows/meets or whatever cause they're lowered so far they scrape all the time in regular driving and the suspension can't work without a meaningful amount of travel. Though it could be bagged (riding on air suspension that can rise and lower).

I think they look silly and they're definitely not practical, but I don't know that stance cars actually end up being a safety hazard, so I'm not inclined be judgey other than to say I don't personally like them. I could be wrong about the level of risk they pose people day to day though- in which case my stance would change.