Head to jit.si and sign up. Then
get all your friends to do that. Then all of you download
Jitsi from jitsi.org
Find out what your friends signed up as. Add those contacts
under the XMPP network. Have them do the same. You will all
get messages asking you to authorize your friends as contacts.
Then all of you have a safer way to communicate. Text, voice and
video, who could ask for more. Watch out that you don't turn up
audio too much, or it will howl.