In the current state, if Tron takes any of the restricted actions on their accounts that my node is not blocking - my node will fork and split from the "longest chain" held by the other witnesses

Only briefly. You will rejoin the longest chain after the next round.

As an aside, I understand why you are doing this but I think it is a pretty bad idea for individual witnesses to make up their own soft fork rules without even any sort of weak consensus with other witnesses. This can easily end up in a situation where there are various conflicting rules, none with a clear majority, and the chain becomes very unstable.