What to do about the baby-care nightmare mother in law?

[HelloHereIAm]

My mother in law has never liked me. We'll say that first. She makes up stories about me and tries to convince people I'm nuts. So these are the reasons I never try to start anything when this stuff happens: She insists she knows what's OK for our baby and gives her whatever she feels like despite what we tell her is and isn't OK. Example: We were at her house Sunday & she wanted to feed our 8 month old ice cream. We said no. She sat at the end of the table with ice cream on her finger and we caught her just as our baby was about to eat it. Then she goes on ALL DAY about how we yelled at her and how she couldn't have ice cream because we were mean and would yell at her again. She also insists that babies are allowed to have honey b/c she fed it to her children. I told her no, that's dangerous and everytime I tell her my baby won't eat something, she tells me she'll mix honey into it!!!! We live in a rural area with not many people around and are (continued below)
limited as to babysitter options. My family lives nowhere near us...only his. I'm terrified to leave our baby with her anymore because she doesn't heed any warnings and insists the baby can have things she can't, but grandma keeps asking if she can please babysit EVERY weekend, and I don't know what to do. Has anyone else dealt with this? What have you done? I don't want to keep the baby away from her grandmother, so that's not an option. Please help!
saq- I never said I was more of an expert. There are new dangers to babies than there were in her day and she won't listen when I tell her about them. Also, it's not about knowing better...if I walked in her house and said "don't give my baby any water today" then that's it! No matter how safe water is, and no matter how it wouldn't hurt her, I said "no water" so the answer is no because I'm her mother. She needs to respect it! Maybe the doctor said don't give her water or maybe our water supply is bad...she doesn't know nor does she care.

[Jillian]

say no, if they cant follow your directions then they are not allowed to be alone with your baby- give her some info on botulism anddd then she'll understand about honey. i personally dodnt care if my MILdoesnt like me, she was a sh!tty mother so i dont trust her. if i mean something i mean something. i say, if its not healthy for me why on earth would i consider giving it to a baby?

[janey + 1]

If your mother in law can't respect *your* parenting decisions, not hers than you shouldn't feel guilty or obligated to leave your baby with her.
Her opinions about food saftey (particularily the honey - It could contain botulism for heaven's sake) are clearly outdated. It was also common in her time for women to engage in their 5 o'clock cocktail with their husbands. This was not a 6oz glass of wine, either. We're talking manhattans, etc...
If you don't want to leave the babe with her, stay home. Thats all there is to it.