

You would probably do better to ask this on the ocean/sailing branch. I forgot what exactly it is called.
I might be wrong on this ... but my impression was that Saudis give very specific visas for the haj. I don't think you can just wander the country at any time, regardless of your religion.
And, coming from someone who is not very religious - I would think that faking a religion just to get somewhere would be offensive to those who do believe. It seems to go against the spirit of why we travel in the first place.