After a few silent months of absence silly inspiration struck and so here we have "The New Ward". Obviously whatever you recognize is owned by JKR ;-)
She wouldn't tolerate this anymore. She already spent hundreds of pounds in repairs in less than a couple years and could not, well, would not face such expenses again, especially as she wasn't the one responsible for the damage. Yes, yes, in the end she was always refunded but it was a matter of pride and principle now.
And this is the reason she is spending another Sunday in her office in the Department of Mysteries, hidden between old books and sheets of parchment full of notes and diagrams. Harry and Ron already got preoccupied and tried to get her to spend her Sundays in a better way, "Just sleeping them out would be better" was Ron tactful input to that discussion. She assured them that she needed to do it, that she can't let her Dad gift get ruined as she promised she would not repair it by magic and tinkering too much with it the muggle way would ruin it in the end.
But today would probably be the last Sunday she will spend in this project as the results of her test run of last night were finally a success.
She used a mild disillusion charm on herself and tried her new ward while walking up and down some of the darkest and most drunkard laden streets of London (just don't let Harry and Ron knew about this or she would not hear the end of it) and no one ever got in contact with her, even when she started running straight toward the most drunk of them, they just got more alert, looked straight at her and then moved out of her way.
Yes, the new ward was ready, it was a portable ward combining a couple common charms, a little tweaked Notice Me Not (that now could be really called Notice Me Now) and a wide spectrum sobering charm good against most of the attention lowering causes like sleep, alcohol and drugs. The nature of magic itself would take care of the other main attention thief, no cellphone would work when hit by the ward, at least until it would stay in the affected area.
It was good enough she decided, now she could go home and finally apply it on its intended target. No, no one will ever bump on her car anymore. She may even end up publishing something abut her new Wake Up And Look At Me ward.