Hi there,
It is my understanding that strata cannot provide private information to other owners, so I suspect it would be the same with Executive Committee members giving out any contact details they may have. I know that in our units, contact details cannot be accessed from strata. We overcame it by asking at the AGM that people put their details on a contact list that was passed around. Owners had a choice then and some owners were clear that they did not want to provide contact details to another owner. One owner even stating that the reason they paid strata management fees was so that they were not bothered by other owners.