Plus, I don't trust a website that's freely available to be edited by anybody when it comes to subjects that are already highly debatable on matters that don't have hard factual evidence to support the articles...
To be fair, everything that's put on Wikipedia needs to have a trustworthy source. But to be fair to that point, even a trustworthy source can release information that turns out to be not true, and that source is still used for Wikipedia. There's a lot of people that manage the pages though, it's rarely just one person, so I think with that double-check people can keep it factual.
But yeah, I don't really trust an eye witness account that doesn't have any proof backing it either.
One thing I don't understand is how time travel doesn't already exist. Millions of years into the future, time travel must become possible at some stage, and if time travellers exist, how do we know they don't come and go from here and change things dramatically for us? We would never know, because our memories of that reality would just erase. Every moment, things could be changing. That's really peculiar to me.
It depends on how time travel actually works, or if it's even physically possibly. Forces in the universe are affected by each other. We know for sure that gravity is able to bend time, so maybe the way to go back in time is to create negative gravity, but how would that be done in the first place? Do we need to keep the gravity differences on our planet in mind? There's a lot of questions to be answered and a lot of problems to be solved.
As for why we haven't seen time travellers appear yet, there's a few theories floating around. One is that the limit of time travel is to when time travelling actually came into existence. That sets a sort of zero point that the machine cannot pass.
Another is that once time travel is actually invented, it is locked away by the powers that be so it can't be abused. There's many historical events that people would like to change, but what would the effect of it be? For example, if there had been no Holocaust, would the future we live in now really be better? It's hard to say such things with 100% certainty, and thus better not to be messed with.
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On the subject of Die Glocke, it's obviously just a conspiracy theory. There was no mention of such a device at all until a book published in 2000, even though many intelligence agencies openly shared the secret Nazi projects that had been going on behind the scenes.
And if I had a time machine for myself, I wouldn't change anything. In the end the experiences I've been through are what made me as I am today, and I'm pretty happy with how I am now.
