Dude, you are being way too paranoid.
Ive seeded files for years and years, here and other places. Not once has anything ever happened. torrents arent the same as some old BS clients such as Kazaa or Limewire.
The chances of someone exploiting you in any way are slim to none and if anything- its more likely during the download process. So if you are going to DL, dont be afraid to seed.
Seeding is the act of putting info out, not taking it in. So if your afraid of anything, you are afraid of the wrong aspect.
tl:dr? if your going to DL then dont be afraid to seed.