I dont think i am the only one that actually does this but when I get seeds in my marihuana, I usually keep them and eventually germinate them and then plant them when its season. So come out and others dont.
I had a big stash with a ton of seeds and I was in a park at a place nobody ever goes to so i threw them over some soil that seemed pretty fertile. I went back there like a month later and to my surprise there where 4 plants about 12 cm of hieght.
Since then everytime i have seeds i throwthem in places where they might have a possibility of growing. 2 days ago, once i had gotten from a friend like 50 seeds I threw them in in front of the cops building, hopefully they come out there!!
BTW im in Chile so the planting season is just finishing, kinda good timing :)