Sure they can....using disappearing ink......

Ah dammit... Now I'm really all hung up on this. These process stories just bust my balls sometimes. Seriously, if a ghost walked in to a tattoo shop (sounds like the start of a joke all by itself) how would the process work?
Would he/she/it get a tattoo that read "Spooky"

?
Or if it commemorates the family would it just be a pic of a bed sheet?
Would the critter suddenly deflate when the needle hit him/her/it?
Would "Passmeabeer" be.. um... self congratulating himself over in the corner while all this is going on and before considering what other art someone is doing to claim as his own?
Would the ghost get a tat in color?
There is so much more to this than one first things of. I need to get a life..... Or a ghost. But only if she's cute. I'd do a ghost. I'm not picky.