Since he'll appear in the gameworld instead of behind glass screens where he's untouchable I'm guessing we can break lore and kill him with ease.
Remember that everyone can be killed if they're "in the gameworld".
We can't kill Oliver unless we side against NCR.
We can't kill Lanius unless we side against Legion.
We can't kill Yes Man as he uploads himself onto a new securitron .
And we can't kill the Gun Runners vendor as he's in an indestructible booth.
But Graham? From the trailer he is to be "in" the gameworld, so we can likely kill him.
/opinion And that would be lore-breaking IMO.
Him, THE Graham, the man that has been reported as being shot dead on multiple occasions, the man who was lit on fire and thrown down the Grand Canyon, gets killed by a [censored] mailman?
I don't care about how demi-god we end up, in lore we're just a mail man and in lore he's THE Graham, lore-wise it doesn't make sense for a delivery guy to kill a beast like him. /opinion
This, however once I got the vendertron out of the booth... It was horrible, I had to run, its not locking us out its keeping him in. He cant be killed, or damaged AT ALL. Also kids cant be killled in the game4 either, I hope graham just gets knocked out. Besides I refuse to kill him, he is just TOO badass qand I am totally going to side with him, damn I would even side with this guy over mr house, and I always side with mr house.