I don't rinse them. I don't eat compost.

I love egg shells; I think it gives so much to the soil. I'm usually don't put meat or proteins in, just to avoid critters, but when we make egg white omelets, I toss the yokes right in.
A lot of serious composters are a lot more scientific than I. I'm a tosser. I used to hate cleaning the refrig...now my DH gets mad because I'm snooping in there all the time taking stuff that's almost reached its end. Anyway, all I do is toss the kitchen scraps, coffee grounds, etc. Occasionally, in the dead of night, the men in my house will go out and pee on it. Liquid Gold. If it gets too wet and stinky (not from the pee), I tear up newspaper into it.
Composting is addictive. My DH even brings home stuff from work for it/me. Look up lasagna composting. That's how I do it fall and winter. Just pick the spot you want to amend. It's amazing.
Have so much fun with it.
And PS...I don't spend a cent on it. It's all already here...or at starbucks.

I save up my eggshells for a week or two, grind them in the blender and add them to my compost. No worries re: salmonella.

I don't rinse the eggshells. I just toss them in to my compost. They get crushed when I turn the container.

Egg shells are a great source of calcium for your plants to stay healthy and free of disease. I use egg shells in compost or just bury them right in the garden. The only problem I see with egg shells is they don't break down very fast unless you blend them up! Other than that they are free fertilizer!

Here is a link that might be useful: Garden Life Japan