That all assumptions are wrong.
dangerous
They are dangerous, because they have at LEAST 30,000 quills.
Who
Dangerous for the lifespan of the PSP at least
It is challenging to determine the single least dangerous country as safety can vary based on various factors. However, countries like Iceland, Switzerland, and Japan are often cited as some of the safest countries due to their low crime rates, political stability, and effective healthcare systems.
A caulking gun.
There is at least some reasonable and verifiable evidence behind a warranted assumption. I think that even with evidence, the consequences of an assumption have to be considered. Evidence is not necessarily proof. If harm will come to a person because of an assumption, then I would consider the assumption unwarranted. You can't go off hurting people because you think you're clever. That kind of behavior will come back to bite you.
The triangle shape
skeletons are more dangerous because they have a ranged attack. A list most to least dangerous... ender dragon ender man ghast zombie pigman creeper skeleton spider slime zombie sheep, cow, pig, etc
It'll take a lot of gumption to espouse that assumption. That's your assumption. That is not an assumption.
Bungee jumping
It isn't especially "dangerous" if you take the trouble to learn the objective hazards of geography and weather, and how to minimise the risks from them.