Personally, I've never understood the whole fascination with some SP fans about what Billy's house looks like. It seems nothing good ever comes out of people having this sort of info.
My gut reaction though is that its probably not a big deal to show what the outside of the house looks like, as it would take a lot more knowledge than that for a person to actually find the place. And it doesn't exactly look like the sort of neighborhood where strange people could lurk around for long without arousing some suspicion from the residents anyway. Nevertheless, if it were my call I probably wouldn't have posted them. At the very least it is kinda of a crappy thing to do.