Sadly, most witnesses don’t bother with setting price parameters at all. Some of them aren’t even sure what the parameters are or what their effects are. There are a handful of witnesses in the top-50 that aren’t even publishing price feeds and haven’t been publishing them for up to 9.5 months, yet are still producing blocks and earning rewards. I do not intend to be one of these witnesses and I will continue to set my parameters to reflect my intention of maintaining the Steem Dollar peg, until or unless blockchain protocols have been changed to reflect a desire to no longer want or need a debt token.

This is a huge issue as far as I am concerned. We have some new additions to the upper ranks of witnesses that do not set this at all. And as you say this is important. Steemians when voting for witnesses should consider this in picking their representations. BUT sadly they do not. These "witnesses" should be pushed out of their spots ASAP.