Are open stock trailers dangerous for horses?

I was considering buying an open stock trailer for my horse but I am not sure if they are safe. it is fully enclosed and it looks like a really nice trailer it just has no partition... Is that safe? doesn't look like there is anywhere i could tie the horses and if there is they would probably have to be side by... show more I was considering buying an open stock trailer for my horse but I am not sure if they are safe. it is fully enclosed and it looks like a really nice trailer it just has no partition... Is that safe? doesn't look like there is anywhere i could tie the horses and if there is they would probably have to be side by side like a straight lode. I do not know if this is safe or not. Please voice your opinion on open stock trailers and where i could possibly find a partition.....
Update: this is the trailer i am thinking about... http://toledo.craigslist.org/grq/2969584312.html
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