Yeesh, at some point you’d imagine that at least the treasure hunters would be like “okay, literally a HUNDRED expeditions were stopped trying to enter or died shortly after entering, MAYBE we could try digging in Poland for Nazi gold?”Very much so.
As was discussed several times, there are persistent rumors that their are vast stores of Gold, diamonds, and other wealth that was squirreled away by the Nazi and stored in both areas. These are backed up by plenty of second hand, and occasional first hand reporting, making the containment zones very tempting for a certain sort of fortune hunter. There are also the same sort of half baked conspiracy theories as exist today (including Aliens, a deal between the A4 and Aliens is one of the favored "alternate" explanation for why no one else is allowed to launch rockets into orbit).
The Guard Force does everything possible to intercept individuals or even the rare small group trying to breach the Wall. Mostly they succeed. Some really unlucky fools manage to get past all the containment measures and get into the ruins.
To date, no one is know to have ever managed to get back out. Once in, there you remain. The guard force has been know to drop in food, if the individual(s) show themselves, but no one gets out. Ever.
Most of them die fairly quicklyy from one or more of the various lethal threats inside. The ones who try to climb or dig? The "Lethal Force Authorized" signs, in about 25 languages, that are on every road, every path, and broadcast/announced on a regular basis are not for show. It is one of relatively few policies that just about everyone in Europe, including the Statelets, supports without hesitation.
Oh lord, imagine if someone tried the “Let’s all Naruto Run into Area 51” thing…