One would think so, and there may be some disagreement among various factions within dispensationalism as to who witnesses what, but generally the idea is that Christ is only visible to the Church at the rapture. The rest of the world witnesses nothing, except that the person standing next to them suddenly vanishes. Like a magic trick. At least this is the way it is often depicted in the pop dispie literature.
Now, if you read 1 Thess. 4 more critically, you’ll see this is a rather noisy event. By way of trumpets and shouts, Christ is announcing His coming to the world. If the pre-trib rapture were true, and this is it, then those Left Behind® will witness a tremendous event that could trigger massive conversions.
So the event is kept secret in that sense. In neo-classic dispensational thought, the second coming is the noisy event, while the rapture is more low key.
more frivolously -- why does the anti-Christ have to be Romanian? I gotta tell my Romanian friends about this, they're already tickled pink by the stories made about their national hero Vlad Țepeș
That is nowhere in the Bible. It pure speculation on the part of the Left Behind crowd.