I don't agree with all the negative feedback left by DTs but I certainly would strongly advise against ~[insert name of default trust member] because feedback is meant as a warning to other users.

By eliminating all feedback left by a DT because just some of it is controversial leaves users unaware of potential identified risks.

Ultimately using a ~[insert name of default trust member] just means that you won't be ware of the potential risks. If you see a warning you can choose to ignore it. If you remove the warning you no longer have a choice.

I recommend adding as many users that you trust to your trust list (and leave them positive feedback) and only exclude people if your really don't trust them (not if they just have a few differences of opinion). That is how the system was designed to work.