My wife bought a big bag of wild flower seeds off the internet and did just that - scattered them in the grass verge. Result: no flowers. The local birds had a feast though.
I guess there is a halfway house.
I'm planning to mow the front lawns which are visible on the street, and the back lawn nearest to the house, to keep up the pretence of tidiness, but leave the back, back 'lawn' beyond the raised beds, greenhouse and compost area, because I can't be arsed to...