I think if d2 account trading had too little room for safe trading to justify allowing it, it'd be illegal already. There's also a guide how to handle the double reg issue
right here. Safe trading can be done and the risk following choosing not to is made well clear. It's everyone's own responsibility to trade as safe as possible. Should they choose to ignore safe trading they accept the risks involved when trading. They don't trade fully aware about the risk then come blaming the site for allowing him/her to take the risk in the first place.