Lets see if Imu gets PTSD by looking at Joyboy
He already knows,, considering Luffy even got a Wanted Poster on his G5,, well to be honest,, luffy already used Gaitling on g5 when he was in shadow mode...
,that's not the point,,,the reason he doesnt seem to be trembling on his boots worried or in fear- is cause even if he is a copycat look a like version of how Joyboy was....HE IS NOT.. Luffy doesnt have the knowledge, the personality, not even the goals, and Much less the Haki..... as Zunisha and Emet sayed.... yeah he bring back memories...but he IS NOT JOYBOY.... and wont be a matter to shit his pants, unless Luffy could pulll out of his rubbery ass , the same level of power,, the JoyBoy Haki displayed on Egghead,,, or even worse,, in adition to that-- Luffy putting her sights on Mariejois specifically.(Remember he just want to be Pk for now) -- Still i consider a good idea,, if i were Imu's to Murder him ASAP,, he should have done that YEARS AGO.
What's scared shitless Imu's on egghead it wasnt Luffy,, it was the JoyBoy Haki...THAT DEFINITLY GAVE HIM PTSD..... the idea to murder Luffy now,, came to be, related to destroy 100% chances he could get that kind of power, they didnt expect he awaken g5 -- FIRST MISTAKE.... second would be letting him a chance to reach JoyBoy Power level.. even if is a 0.1% possibility - didnt matter, they need him DEAD.