

At this point, if you are a non-citizen legal resident, avoid traveling abroad unless you have a squeaky clean record. Not even a speeding ticket or citation, or anything that gets you on a record somewhere that can be potentially used as a reason to deny you re-entry.
Nope, because I use it myself. But I don’t use it as a conversational tool though. I just use it as confirmation that I received and read what you sent but it isn’t necessary to continue the conversation. For example, I’m already in a conversation with someone and the assumption is I need them to send me a file. When they finally send it over, I just react with a thumbs up to confirm I got it. Context is important. The emoji is only as meaningful as the context of the conversation it is in.