Two views on availabilty:
“Why on God’s green Earth would you be on Twitter? Because first of all, the worst thing you can do is make yourself more available, right?”1 —George Clooney speaking to Esquire
“Be of service. Whether you make yourself available to a friend or co-worker, or you make time every month to do volunteer work, there is nothing that harvests more of a feeling of empowerment than being of service to someone in need.”2 Gillian Anderson
These opinions of George Clooney and Gillian Anderson are not necessarily in conflict with each other; but perhaps they show a difference in their personality types.
1 http://www.esquire.com/features/george-clooney-interview-1213-3
2 http://www.gilliananderson.ws/charities/