Cross the border and among the things you might have to declare: your Twitter handle, info about your Facebook account and more.
A proposal floated by US Customs and Border Control would ask people to voluntarily tell agents everything about their social media accounts and screen names.
The idea: to better investigate those who are crossing the border.
Customs officials aren't the only ones who want to peek through your posts.
Some employers already ask their employees to divulge details about what they're doing online, and one service promises to help landlords investigate future tenants by digging through their social media histories.
To look at the way people are trying to scan and survey your social media presence is Russell Brandom, reporter with The Verge.