compost heap give it to a friend but don't tell them it's male as a joke use them for breeding your own seeds thats about it
You can put them in isolation and make your own seeds. search for "male isolation chamber" on here and you will see it. If you don't need seeds, then compost it.
I dried mine.... then saved pollen... I used SOME of it to pollinate a few Buds... Because the Male was the same strain as my VERY nice Female... I will freeze the rest of the Pollen... Maybe use some next year... I still have CLONES of my nice female... . I'm not making the seeds to sell... But saving money by having my own GOOD STRAIN.