How far is too far?

What would constitute going too far to try and sell more copies of a book?

(a) Infiltrating websites under an assumed name, so you can contribute to forums dealing with topics vaguely related to internet dating and innocently finish by saying you'd just read a great book on the subject?

(b) Joining book discussion groups, purely so you could mention that you'd just read a great one about a bloke who became obsessed with chatrooms?

(c) Contacting newspapers in Bromley ( where you were born and raised ), Oxford ( where you went to live after leaving home), Leeds ( where you worked for two years ) and Manchester ( worked for two years there as well ), telling them all about a local author's new book.

(d) Going into chatrooms under the name Lord Brett Sinclair and when asked about the name, say you got it from a brilliant book you'd just finished.

(e) All of the above.