I have a constant and on-going problem with cars parking across my driveway, despite having a 'do not obstuct this drive' sign up. A decade ago I went through planning to get a white line painted along the dropped kerb as a visual reminder to not park over the drive. It's now worn off quite a bit but is still just visible. Would I be unreasonable to get some road paint and carefully go over it again? Due to funding issues, the council no longer paint these lines. Very soon I'll be back to square one & blocked-in at all random times, which is infuriating. What d'you think?