Default dates on vol opp search form misleading

When you first visit civicrm/a/#/volunteer/opportunities, the opportunity listings are unfiltered. However, the date fields in the form default to "between <today> and <30 days from today>."

This mismatch is a bit misleading. On every search except the first (i.e., initial loading of the page), the criteria in the form match those in the URL as well as the search results).

Here are a few options:

1. disagree with me that this is counterintuitive and leave it alone
2. don't supply the default dates in the form at all
3. incorporate the defaults into the initial search

If we choose to incorporate the defaults into the initial search, how do we allow unfiltered searches? A URL like civicrm/a/#/volunteer/opportunities?date_start=&date_end= would do the trick.