Yes, I should perhaps be more clear. If you had a completely secret name on, let’s say, Reddit, but when you arrive in the US, you didn’t have the Reddit app, you have no emails from Reddit, you don’t use the username for anything else, and you clear your internet history - that is what people are recommending can be hidden this way, I think? The idea is that they will be checking what’s on your phone and decide immediately on clearing you or denying you, and I don’t even actually know if that’s the case.
Most importantly to me though, I’m very concerned that they proposed this without including an exhaustive list of what constitutes social media. Will Mumsnet be included since we have a “political” reputation, but Netmums won’t?
But yes, of course your accounts will still exist even if you delete the apps. The question is how much will the US government dig if you go to that trouble (delete apps, etc).