I was looking at these on your 1996 website just the other day.
First of all, the vast majority of them are well funny. I stay in a lot of hotels (due to my job, not because I am (yet) homeless) and I can honestly say I would appreciate it if I were to open a drawer or whatever and find some of these messages.
However, unless you have permission, it is graffiti and therefore criminal damage (as far as I gather). This could be problematic both for a publisher and for you.
It's true that Banksy does the same kind of thing but that's why he keeps anonymous (plus his work thrives on the mystique).
A straight-laced publisher might get jumpy.
Moreover, if you put your name to it, a hotelier looking for revenge/cash/both might get onto his lawyers and judges aren't known for their sense of humour.
"But it's funny, your honour!"
"Send him down!"
I think a pseudonym should be employed.
I'll tell you what, if you want I'll run a pseudo art review of your work on the Rake & Herald. This is, after all, the new street art. Room art we could call it.