Delivery riders are exploited by their (non-)employers: paid a pittance, fined if they take too long, and sacked if customers complain their pizza is cold. If the delivery riders were employees, and their employers had a financial incentive to ensure they rode safely and obeyed traffic regulations, then you might see a change.

Until then, be a bit understanding, and drive super-carefully in the evening. If you have home food deliveries yourself, tip them well. And if you're selecting a restaurant, avoid ones which do deliveries because they'll fulfill the take-away orders before serving you!

Unrelated, but here in rural Kent I've noticed that drivers have become more careful when passing cyclists and less likely to hoot when I wait to overtake. Motorists understand the effect of potholes to a cyclist!