Seat drains

Our seat drains seem to constantly clog up with what ever blows our way (seeds, pollen, and such).  We have mused about upsizing the drains to 3/4 inch.  I am curious if anyone has ever done this.  It would seem that a problem would be trying to get them close to flush on the seats. I have also thought that maybe a bathtub screen might help when the boat sits on the mooring.