Please note that blasphemy, as a crime, usually involves insulting the religious feelings of the public in some capacity. If you declare yourself a deity, you are certainly not going to have people being charged with blasphemy for insulting you. In fact, since you are manifestly NOT a deity, nor is there anyone in the world who thinks you are, such that their religious feelings would be insulted, it is far more likely that you will be escorted to the nearest State Mental Hospital.
As far as God being a nice guy and saying, "Hi, there. I was having a nap. Come back in five," or some other inanely stupid remark, or being a happy and cheerful God who would never kill anyone for looking at him, I don't think it works like that. It is not God who kills you. It is the power that emanate from the holiness of God. It is like the Priest who touched the Ark of the Covenant and was fried to a crisp for it. I don't think God particularly wanted him to die. I think it was simply a natural response to unauthorised contact with the holy.
In the early 1960's, at MIT, there was a professor and his class that tried to build a replica of the Ark of the Covenant. They ended up having to destroy their creation. Why? Because the thing started to conduct electricity and was very nearly exploded. Had it actually done so, it is estimated that it would have taken out a whole city block. What did Moses have that this professor did not? The blessing of God, and the fact that God sat on the Mercy Seat of the Ark and spoke to the Children of Israel. The Ark was no different. It is the use of the Ark that made the difference. The first Ark HAD a use that was blessed and sanctified by God. The replica did not. It is that simple.