The problem as I see it is your are presumed to have one of these things in the first place. If they wanted to get publically available information, there are search engines and facebook's search, they should just do that. But by asking you to find yourself the onus is on you personally to produce a result- and what if you don't have one? Will they believe you? Should we de-facto require everyone in the world to get social media accounts with American companies that look presentable should they ever want to visit?