Update on Stop he who must not be named signs:

[whomiga]

I got other pictures around the area and found a total of 5 stop signs with Voldemort added. I checked again a couple days ago and the signs have now been cleaned and/or replaced, so they no longer have the name written on them. I may post the pictures of the ones with Voldemort added in the next few days.
Considering the end of the Deathly Hallows, the signs might be considered as no longer needed :-)