Bisq doesn't use a reputation system like that, so that wouldn't work on Bisq. Other sites such as HodlHodl let you view the profiles of everyone who has left a user feedback, so you can easily see if they are all fake accounts with only 1 trade.
Was kind of bummed out that HodlHodl and Localbitcoins aren't available to usa residents. In that sense then they are not reallly decentralized exchanges. They are centralized. that's the usa for you though. always protecting its citizens to not be able to use services they might want to.
so far i got bisq, agoradesk as ones that a usa person could use. and localmonero if you're into xmr.