Okay, not to break up the tinfoil hat party here, but you're not going to get dragged off to US prison for following Birgitta Jónsdóttir (Icelandic, not Swedish) on Twitter.
The U.S. border security has been monitoring social media for years.
http://www.dailymail.co.uk/news/article-2093796/Emily-Buntin...
https://www.theguardian.com/technology/2016/jun/28/us-custom...
Yeah, if you post threats on your Twitter account immediately before visiting a country that could be an issue. So don't do that. Threats against persons or property are reasonable things for public officials to be concerned about.
I repeat: you're not going to get dragged off to US prison for following Birgitta Jónsdóttir on Twitter.
I strongly agree that Ed should be pardoned and that the US government has a lot of problems (like any country), but let's not go completely overboard here and write off the entire country as North Korea meets McCarthyism with a heaping side of Turkey. You can't and won't be prosecuted here for having a political opinion or for following people that do on Twitter.
If I had the slightest hint that I will be prosecuted or go to prison,I would never risk traveling in the US. I am not a person of interest by any means for any gov.
I was referring to a possible detention in the borders, stripping, electronic devices control and so forth.
I remember reading the article via twitter and after a while watching a tweet from the politician in question appear in timeline.
I didn't even recall following her, but at some point in time I did. I froze and panicked, my twitter account is eponymous.
What will happen to me when I cross the US border? Hopefully/Probably nothing, but the thought lies in the back of my mind.