Off the clock? Hyperconnected workers sue employers
arstechnica.com
arstechnica.com
If you require hourly/non-salaried employees to attend concalls and check ticketing systems during off-hours, expect to pay OT for that time. Smart hourly employees will find the broadest interpretation of your requirements to rack up maximal OT comp for minimal work. Serves you right.
If you employee non-hourly ("exempt") workers, there is nothing here for you to be concerned about. That's why they call it "exempt".
For salaried employees, this seems a nonissue in most cases. Unless they are specifically told otherwise, they can normally expect to work more than 40 hours, and they are also normally in either management or creative roles both of which can face deadlines requiring far more than 40 hours to finish the necessary work.