I am always afraid of this kind of clients.So first, when i start to design a new website, i just show a picture (jpg file).Then later, i always show the website on one of my webspace. If the website is very simple (no php no sql or whatever), it can be stolen pretty easily, so i protect it with some tools like "Encrypt HTML", and i add some special stuff on my flash animation.They still can stole it, but it will be pretty boring for them to modify it.Another idea, if you have some flash animations on your website, it can be good to add some special hidden features...like for example, after 1month, it will show something totally different. A new message or new animation or even it will open another website...we can make lots of fun with flash :DSo i think, next time, try to protect your work...it can be pretty useful i think (especially with this kind of clients)