ok then, let's put aside that God won't fall of his throne if his name is used 'in vain' ie blasphemy. He won't (he clearly hasn't), he can take it (imho). He could knock your head off for being rude but he won't, he's good. He could though 
imo it is rude to use blasphemic (is there such a word) words about the christian God as christians generally love the person who's name is being disrespectfully used. We wouldn't like it if eg our child's name was casually used as an expletive. Just putting forth forward a comparison. Emotive, no doubt, but as I love both God/Jesus and my children, it is an appropriate comparison imo. My children's names conjure up who they are and their names are therefore precious - I would be hurt and offended if their names were used in a flippant or derogatory way.
As per usual, people seem to mix up God and religion - they are poles apart aren't the same. I loathe religion, as it happens, precisely because it doesn't represent the one I love - doesn't come close most of the time, and certainly has done a lot, historically, that is truly vile... in God's Name. imo that is the definition of using God's name in vain ie putting God's name to something that has nothing to do with God, is the opposite of who s/he is eg religious terrorism, gay-bashing, Rhode island bashing etc. Jesus also loathed religion and was openly scorching and scathing about the religious leaders of his day because they used God's name to oppress, bully, control, force, intimidate, manipulate etc, not just practically but emotionally and psychologically. God doesn't do that shit, and loathes it, particularly and especially if done in his name.
As a christian, Spero, I can truly say I am sorry for what christians have done down the centuries in God's name. I am rightly ashamed of a lot (most?) of christian history ie the vile stuff. Most christians are.
I wince if people use God or Jesus' name as an expletive, for the reasons above. As far as I'm aware, not many people use the name of Mohammed, Allah, buddha etc, as an expletive, not just because in the west we have not learnt culturally to do so but because we know it would be deemed hurtful and offensive to those who sincerely believe in those deities if we did. Some want to be hurtful and cause offense. ok then.