There is no danger in taking bath during the menstrual cycle. If you don't take bath then in it will to dangerous.
I wear a tampon to take a relaxing soak in the tub while on my period, occassionally. Like BlkDiamond advised, you may still want to shower off right after. I am very squimish about blood, so even with a tampon, I rinse off just to be sure I am clean. :)
I wouldn't think so >.>
No, I don't think so just make sure the water doesn't start looking like Kool-Aid!
No, but you might want to take a shower so you tub water wont have blood in it and you cont be chillin in bloody water. I take showers.