My thinking is that we need to make as clear as possible that this is a testnet and it's tokens are worthless.
I agree. But I would like to treat a testnet like a staging environment, where things should be as close as possible to real network. Maybe an alert/reminder after loading a page would be enough?
Calling them USD and pegging them similar to BTS:USD is counterproductive imho ..
In my opinion we have too many assets, what is very confusing for new users. For example, we have BTC, openBTC, metaBTC, etc. now we are going to have even more assets in the testnet, like PEG.FAKEBTC, because without making a pegged assets there is no possibility of creating those assets by collateral. Am I right?