People who text me asking how far I am when I'm on the way knowing I'm driving, especially when I don't reply and they send those 
People who try and get me drunk knowing I'm driving 
This used to drive me round the bend ( sad pun intended 🤐)
Now, as soon as they are booked, I send a text with their full address, my ETA, duration and fee "cash@start please" and tell them I can no longer read texts or respond to calls until my arrival..
This has the added benefit of cutting out all the wanky "What will you be wearing? Do you do Anal? Can you bring some toys/uniforms" timewasters and they usually text cancel immediately ( in a panic

)