Those scam project will only affect the reputation of their exchange nothing more .

It is the same as etherdelta before where many people using it at first and then suddenly disappear when they found that the platform is being use by different scammers to sell their tokens . Thats what I think soon to happen in unisswap exchange, if there are no people use that exchange scammers that use it will also gone for good and they will find other alternative to move .