If women with tight clothing are the best reason you can think of to not purchase a product, that is a pretty damned good endorsement of that product... Your objectivity is compromised if that is how you make your decisions.
If women with tight clothing are the best way you can think of to sell your product, that's pretty telling of the technical merits of your product. It's safe to assume you've given up at that point, and you don't have anything else worthwhile to see.
If you are making your purchasing decisions based on the presence of women in tight clothing instead of the absence of technical merits, you are compromised. You should be able to judge the technical merits while ignoring the "booth babes", otherwise you're not much better than people who only purchase products because of them.
If no technical merits are present, then you by certainly have a far better reason to not purchase a product than just "they had women in tight clothing".