Generally I say something along the lines of -

"Sorry I am booked up until X oclock.".

Then store the number and don't pick up again.

I am paranoid, and I don't want to let them know the reason, so they won't "fix" it and snow me, somehow--even though I DO save numbers.... so I only tell them I won't see them when it's in response to a stupid question like "how much" "What do you do" etc. Then I tell them I don't answer those calls on the phone and they need to have another review of my profile--which they NEVER do. Fortunately, these are usually the same guys who CLEARLY have no idea who I am and have likely saved my number under "whore" or something. Because I have even had them ask "what's your name again?" At which point I tell them I'm not going to make up for their laziness and I hang up.

I also use the "I've already had one incall, today, and I only do one, maximum, a day." This also serves to send them away without getting their ire up. I'm probably giving 90% of these particular types more credit than they are due, but...

I'm stealing many of the ideas in this thread! "I can't talk now" is brilliant, cos you can just pretend to be in the supermarket or something; they don't need to know any different. And like YourTera says, it is really important not to let these guys know directly that you don't want to see them, lest they get nasty or even try to trick you into seeing them in future somehow; obviously it's much more likely that they'll just take the hint and move swiftly onto the next girl, but it's just important to protect ourselves from the many odd'uns out there. I also just answer any silly questions with, "I can't discuss that sort of thing on the phone, I'm sorry, but it's written on my website so you can just find all the answers there and call me back later", which works pretty well cos they obviously already knew that and were only testing the waters with you, so they never call back once they know you won't let them waste your time making fantasy bookings.

Like the OP, I just find so often that I know within the first few words of any email or call whether or not the client is a genuine, nice-seeming one. The obnoxious ones, as part of their obnoxiousness, obviously see nothing wrong with their own behaviour so fortunately they remain extremely conspicuous! I do always say that you can basically let bad clients screen themselves out for you by just giving them enough leeway to be their horrid selves - so thank God for that, I suppose.

I find that some are so thick / stupid / insensitive
that despite me saying I'm currently:

• Having coffee ATM with my mum,
• Administering CPR to a stranger collapsed in the street,
• Being interviewed by the police in connection with a stalking allegation

that they still demand a run-down of fees and services!

So, rather than rely on their good judgement and awareness
(which is lacking in most men when they have the horn)
I put the ball in their court.
I let them decide they actually don't want to see me, ever.

This works:
Oh sorry I cant see anybody for the next few weeks;
I'm on anti-biotic's to clear up a mild dose of gonorrhoea. 

For some reason, they never ever phone me back...

Hahahaha!! J- you just slay me!!

I tend to also put the ball in their court, usually by saying something like "I don't think we are going to get along really", or "Obviously if I won't describe your fantasy in full then I'm probably not the girl for  you".

I'm the same. If they haven't read my profile I will NEVER see them. I also hate being called Babe.

I've had that a few times.
I say:
So what you are asking me to do is supply you with a Class A drug?
Is this correct?
Do you have any concerns that I may be an under cover DEA* agent?

They usually go away after that.


* The DEA Law Enforcement Officer is keeping in with the USA Feds thing I seem to have going ATM.