I live more out in the hick lands of berkshire - here we have a load of delivery riders, though I must be honest I have not noticed them being driven dangerously, or ridiculously fast.
I would presume for them, as it is all or part of their income, it is in their interest to keep the bike in one piece.
I have seen them going down no entry roads, or places where they simply shouldn't be, but again not dangerously.
I personally wouldn't choose to order food through a delivery service, I'm close enough to walk in to pick stuff up, and I just feel they have a pretty hard time of it - I'd feel guilty taking the delivery from them, even though I know it's very marginally adding to their income.
It just doesn't sit with me well - but I'm not having a go at people who do use them.
There are however a couple of local ebike riders who whizz up and down our road at serious speed - I can only estimate, but it's a small residential cul de sac, and it's got to be in excess of 30mph.
They ride with and without helmets They have masks on when not wearing a helmet), sometimes solo and sometimes two up.
I've also seen them riding at night using a phone to temporarily light up the road so they can see, but they stop as soon as they are through a junction.
There are children, pets, and foxes on our road, so a reasonable chance of something getting injured.
It's been reported to the local plod, but seemingly nothing has been done as they continue to ride around.