Can someone find your identification from the account id of your various ads such as adsense, amazon or clickbank? Can one run a "reverse lookup". I bet if you did a google alert with a character string of someones id code you could reverse lookup?
Also there is the issue if the domain is an "add-on" domain because I believe the parent domain of the Hostgator (or similiar) host can be determined. If that website is id free then fine. But if not!
I am examining affiliate marketing and many seem to advocate generating sites in areas one does not even know about with various software. I would not want my id known in these fast sites because in other sites I care strongly about my material and list my name. I don't want to taint my "brand" as novice as it is.
Thus even if the site were not in a controversial area if I was just writing it to generate affiliate income and it was not a "heart vested" site I would want to also be anonymous!