A straw man argument act is simply trying to undo your opponent in a debate by falsely attributing to them a worse, weak position. One you made up, you can more easily attack.
By attributing the 'Ah then so you think that ppl should play with radioactive blah blah' nonsense to me, as if it even logically followed from my post - which as any reasonably astute observer can see - such a notion most certainly does not follow that that is my view, it is the respondents weak made-up nonsense to discredit my original post.
So yeah, muckmouth, you straw-manned it.