NEVER give them your personnal details for a few months.
Try to sound uninterested, let them chase you, grovel, etc, as you point out, the idiots go for easy pray, if you make them work, they soon give up.
Use http://www.meetic.co.uk/
Tell them you have LOTS of friends who will look after you if they piddle about
Write down a long list of questions to ask them over weeks, some personal, some about things they may not want to answer, write down the answers, and then ask again in 3-4 weeks, and see if the answers are the same.
.....or I could find you a Welsh farm boy if tou don't mind the smell of pig poo
