If you describe someone as ~, you are criticizing them because they do things without properly considering their possible consequences.
I felt that it was ~ to advocate the legalisation of drugs...
? responsible
ADJ: oft it v-link ADJ to-inf disapproval
irresponsibly
They have behaved irresponsibly.
ADV: usu ADV with v
irresponsibility
...the irresponsibility of people who advocate such destruction to our environment.
N-UNCOUNT