I find it's always worth checking first with the person whose number you are giving out, in case they want the call on a different number (e.g. mobile).
What I find that people can be careless with is email addresses - circulars etc really should be sent out b.c.c. if going outside the organisation, particularly if people are using personal email addresses rather than business ones. OK you may have given your email address for use with that club or whatever, but you might not want it circulated outside that organisation.