If you think you disagree with enough of someone's feedbacks, you ought to exclude them with no question.  That goes for you, me, and everyone else.  You said yourself that you agree with a lot the trust Timelord2067 has left in the past, so I'd say if it hasn't reached the tipping point for you yet, don't exclude him.

There have been DT members who've left inappropriate negs for others in the past, and I didn't exclude them from my trust list.  There has to be some leeway IMO, because nobody's perfect.  But let's take JollyGood as an example: I didn't exclude him until he made a habit out of having a hairpin trigger with the red paint spray gun.  Otherwise his sent feedback is/was spot-on.

Timelord2067 has had questionable judgement ever since I became aware of him years ago, so I'm not going to be excluding him--nor am I going to argue that others shouldn't, though, because I would certainly understand why he'd be deserving of that.