Will pouring boiling water on an iced up windscreen crack it?!
Yes It can....
I once had a windscreen crack on me because I had a lamp on it which heated it up, once it was nice and hot a drop of cold water dripped on it and cracked it.
It is very possible due to rapid expansion but, your neighbor will learn soon enough.
I actually agree with you, scraping off ice can be enjoyable and calming.
yes, that definately can crack the windscreen. Maybe it looked boiling (steam on a cold day) but was only warmis water?
It can, but you can't predict.