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Just because the MOH is hosting doesn't mean she chooses what you do for the evening. The night is about YOU and should be planned as such. When someone takes on the responsibility of being a MOH that is what they are signing up for. Planning parties, organizing, helping you put together invites, etc. It's part of the deal. That doesn't mean the bride gets to go all Bridezilla but she should def have input on what her special night is going to be.
I don't think your being bratty, rude or anything else. If your going to be unhappy with what she planned ie the stripper than why have a party in your honor. But first you need to express to her that your uncomfortable with the idea because maybe she didn't know. My mom and MOH (my sister) are planning a Jack/Jill shower for me next spring, the rest of my BM are planning another shower for me probably at my house (which is fine because they all know I'm a total control freak and will freak out if something is not right), I am however having a work shower given by my co-workers in a few months and all I know is the date and the place, everything else I'm letting go of and I'm okay with that. As for my "last night out" so to speak, I'm planning 90% of it since we have to have it 2 nights before the wedding due to it being a destination wedding for all of my bridal party and majority of the guest. But since my mom and future mother in laws will be attending I'm not so sure if strippers would be a good thing, I personally have no issues with them, but other people might and I don't want other people uncomfortable either. Good luck and hopefully she'll respect the wishes you don't want.
You need to speak to you MOH. I am getting married Sept 10, 2011. I went dress shopping with a few of my BM's and as I came out of the dressing room they were whispering and gigling. I knew that they were talking about making plans for my bacherlorette party. I looked at them both and said "no strippers, no strip joints". One of my BM's said "Of course not, the bacherlorette party is about the bride and what she likes to do, and your not into doing something like that." My BM is exactly right, this should be about what the bride likes to do. I was extremely happy with my BM's answer.