I never give my phone number or address until I get a "email me for more info" response. If I feel that they are serious, then I will ask them if they want to take it to texts. At that point phone numbers are exchanged. If the good vibes are still flowing after that, my street address is given, or asked for if I am buying. Frankly, I love the CL process. I've met many good people, and some of them are now friends of which I communicate frequently and also ride with.