1) No evidence, and I question how that happened.
2) If that's happening, then the sealing is faulty.
3) More plausible, but such a thing would be happening with normal seals, and I trust Kakara more then I trust normal guards.
4) Any Seal would almost certainly come with a "mute" button.
5) Again, if the Seal is that faulty, then normal sealing was going to be a problem.
1) No evidence
for or against, depends on details of how souls/spirits/minds work, details Kakara doesn't know and WE don't know as a collective body.
2) It is
not an implausible flaw. A seal that allows the dragon mental influence or control of the muscles/nerves/etc of its container would work just fine if the container has no nerves/muscles/etc to control. There's no point vying for mental control of a rice cooker; it's an inert object. There are considerable advantages to gaining mental control of a super-saiyan.
3) Kakara is more trustworthy but also in many ways more vulnerable to a malicious agent that lives inside her body. Imagine how
FUCKED Jaron would be, trying to do the stuff we do with all our conspiracies, if Jaffur were a
hostile passenger who shared his senses and could occasionally, with great exertion, whisper a malicious inconvenient fact to the wrong person.
4)
How could you possibly know that the mute button would exist or work reliably despite the dragon's interference?
5) No, because if we sealed the dragon normally
and did not poke the seals, there would be no danger of us opening a hole in the seal on purpose and accidentally letting the dragon out. If we seal the dragon inside Kakara, and the plan most of the "seal inside Kakara" advocates have in mind unfolds, that becomes a risk. It normally wouldn't.
1) Actually, there kinda is: Namekian "Fusion"and Majin Buu's Absorption. Possibly Cells assimilation of 17 and 18 as well, consider he ended up puking 18 out.
2) It actually came from the RP, where there's a similar situation, and a Discord channel which has both me and Fourth, where I wondered if, with its telepathy, Dazarel could transfer it's mind/soul into a new body.
3) Kurama wasn't buddy-buddy with Naruto at first either. And that rate was higher then that for the most part, and the discrimination they faced played a large part in that.
4) ...I'm not sure how it would explode the hosts head.
1) We are neither a Namekian, nor a Majin, nor an android.
2) Either your information does not reliably translate into you having sure-and-certain OOC knowledge about how this works, or it does. If it doesn't, you're still gambling and really,
really should be able to see why others think this is dangerous. If it does, then you're grossly abusing your access to OOC information not available to the majority of the questgoers.
3) Dazarel is not Kurama, Kakara is not Naruto, the situations are not the same and I do not want to bet the farm on everything being the same- I assume, of course, that the whole Naruto thing ended
swimmingly, since I don't actually know anything about that setting.
4) Neither are we, but if the sealing attempt somehow fails disastrously, say, due to the fact that
none of the sorcerors have ever seen a dragon or a psychic in their lives, let alone something that's both at once... I'd much rather that the attempt fail by blowing up an inanimate hunk of stone than, say, Kakara's intestines. Or, worse yet, her skull.
In reality, freezing organic beings is a fancy and somewhat sadistic method of execution. Absent magic, the same is true here.
I wouldn't actually be surprised if, say, Namekians or Arcosians could survive being frozen solid. Humans and near-humans like saiyans? Probably not. Dragons? Who knows?
That said, yeah, if you're not willing to kill a dragon, freezing it solid is a no-no.
[This is irrespective of whether there may be workable methods of cryogenic suspension for humans; I wouldn't be surprised if there ARE, but the technology clearly isn't as simple as 'stick them on ice.']