You are obiously confusing arranged marriages with forced marriages. The majority of decent families I know of would never let their girl get a taste of whats out there, hang around with boys before finding "the one".
Moreover, arranged marriages are not really forced marriages as mentioned above. Usually the guy/gal can meet in the presence of someone and get a feel of whether they are compatible.
The biggest disadvantage of love marriages in my opinion is that when the prospective guy/gal are around each other, they put on their best attitude and I hardly think that you can *really *get to know in a couple of weeks/months.
U don't think those in "arranged" situations are acting and on their best behavior?