On Mon, Jan 24, 2011 at 10:32:16AM +0000, Mauro Santos wrote:
I guess they do (or they should, never tried it myself) and I also believe that they ask for the email's password before they can spam mail everyone. To add insult to injury some sites require (or used to require) an email address and the respective password so "you can keep in touch with your friends" before allowing one to complete the registration process, or keep nagging you afterwards telling you that "you are not keeping in touch with your friends, please give us your email's password and let us mass spam everyone (tm)".
I've never run into a situation like that but I can tell you for sure that I will never give such sites a password to anything! Furthermore, I would drop such a service faster than a hot potatoe. When I 'invite' people to things like linked-in or dropbox, I do it on an individual basis and would hope that the invites be relevant to the persons involved. Like with Linkedin, I like to add a personal note to each invite or request to be linked so the person receiving the request realizes it is me and not some generic spammer out there.