I've found that it was too easy for my co-workers to ping me on things that can wait until the next day or stuff I can't do anything about until I get to work. I've asked them to call me if there's an issue that I have to fix. So far I've gotten zero calls and it's been over a year. If ever it becomes an issue I've got internet access within 5 mins from me. I suspect it's the same situation for most people.
