These particles split into a crap ton of lower energy ones when they hit the edge of the atmosphere, nothing that makes it to humans has enough energy to be felt, even if they interact with you. (they probably won’t)
Dictionary attacks aren’t some magic bullet. There are a lot of english words and just four of them IS comparable in cracking difficult to a standard 8-char password that is as random as you can make it. There are a lot more words than there are symbols. Four words is obviously not as good as 46 totally random chars