WOW, what precautions!

Honestly, I don't think the plants will survive in a garbage can without water and in too cold/hot a temperature. Besides, I don't think the garbage people actually throw the garbage in the water (i.e. lakes, rivers, oceans, etc.). If they do ... then I am
OUTRAGED
! Never heard of anything like that! Is it really possible? Anybody heard about or saw something like this happening?
Anyway, do kill the plants by freezing or boiling (or burning probably at best) if you're genuinely concerned and believe that your garbage is dumped in water somewhere.