I hope you realize that you'd be contributing more as an anonymous leecher who gives seeders someone to seed to rather than as just another seeder sitting around waiting for someone to seed to. BakaBT is unique because it's heavily overseeded. Seeders coming in don't contribute - they make the situation worse.
And that is your sole opinion, not a fact. Why don't we all just stop seeding and become greedy leechers, heck that would make the situation bloody awesome.
The fact of the matter is that seeding on BakaBT is really not _that_ hard despite the overseeded torrents issue. Honestly, no private tracker can be seeded on as easily as you can on BakaBT without even cheating yourself by being a public leech and then seeding back. So please stop telling people to be one!
Bottom line is 3 options already mentioned:
1) Be an annonymous leech if you can't be bothered by seeding at all
2) Annonymously leech, but seed back what you've leeched anonymously as well as Zel47 explained
3) Just seed as much as you can. There are plenty of freeleech options available that will not impact your ratio - and just seed as much as you can. Not just a set number, seed everything that you have on your hdd for as long as possible.
The only tip for best results there is - seed anywhere from 30-1000 torrents at a time (50 or so is actually quite sufficient), and your ratio will steadily increase.
Seed all hentai that you can, they tend have a better stream of leechers. And lastly, patience.