From your conversation i got my answer why escrow.ms and one more user is not leaving trust for the trade done b/w us because it will add me into default trust which is not fine for now.
No it wont. You can leave a user trust and you can add a user to your own trust list, they are two different things. If you add someone to your trust list and you are in DefaultTrust level 1 then that person will get added to defaulttrust level 2. Only theymos can add people to defaulttrust level 1. All feedback left by people in defaulttrust level 1 and 2 will show up as trusted feedback.