I get a general sense that this decision is motivated by personal insecurity of your own characters opposed to what is an objective outlook on the situation. You're also overestimating what can be done with a name and affiliation. Look at Dart for example, since he seems so worried that someone is going to find out anything about his character. If I have your name and affiliation I'm still going to have to deal with the fact you never step foot outside Kirigakure, which is surrounded by chakra eating mist and a million other defenses. Then, assuming I get past that, I have to deal with the entire hidden mist village in addition to you in order to do whatever it is I'm trying to do. The only thing that has become easier for me, is narrowing my search parameters, and maybe some knowledge on 2 of possibly 4-5 kekkie genkai depending on how you run your character.
Or let's use Eric as another. Eric Nara only gives me the information that you would have Shadow manipulation. If I otherwise knew nothing about you, I would still be in the dark on the entirety of your arsenal save for one Hiden. You could have any number of KG and I wouldn't be able to extrapolate even one (other than maybe whatever KG is related to the beast in question). Not only this, but The Nara Order wouldn't have registered as a blip on my radar, so I wouldn't even know where to begin when it comes to finding you.
That's two examples of why having a name and affiliation wouldn't equate to anything outlandish for the host in question to have, and even if you could extrapolate a fair amount of information, you still have to have the skill to follow up on it, which falls upon the host.
I also find it disturbing that people are so willing to conflate "easy" and "metagaming" into one concept. Just because one thing is easier to achieve over something else does not make it somehow against the rules.
As for knowing who has been a tailed beast host in the past, I'm sure plenty of us have extensive knowledge of previous hosts, save for those whom only lasted a handful of weeks at a time, and each can likely be proven by searching through old threads on this very forum. I know for a fact there is a thread where people were discussing the official release of what the beasts actually looked like however many years ago that was. Back when Toumaster had an 8 headed snake for the 8 tails. We ca go plenty far back to observe a great number of the hosts.
But really, if the community genuinely believes it's more fair to just have the beasts memory wiped, then fine, it's no skin off my teeth. I would actually be far better off, because I can't interact with a certain host right now because his beast would have information on me that would really stir the pot. I just want this decision made based on an objective outlook, and not people looking for another way to bury their heads in the sand.