Unless they also require you to turn on a webcam and give them control of it, there is no way for them to verify you don't have someone else underage in the roo

Unless they also require you to turn on a webcam and give them control of it, there is no way for them to verify you don't have someone else underage in the room watching with you. At some point, a country has to decide what level of possibly illegal behavior is acceptable to avoid the panopticon police state required to prevent any and all possible violations.