retoswap.com is an example, more is always coming. I don't know were your pessimism comes from. There have always been ways, even before exchanges existed. People used to buy bitcoin on ebay early on. There will always be ways.
Discussion
Retoswap is excellent. Until the government invests resources into catching swappers.
They can use the non private Bitcoin and tether addresses to locate one party and put him in jail.
Once this happens people will stop using it.