who have to worry about Blizzard's mins are the ones using the Blizzard's tool

It's not set in stone, but our current plan is to allow group leaders to set their own restrictions (such as ilevel) when wow or using the Group Finder tool. We'd rather allow players to be upfront about such things than create a situation where an undergeared player is joining groups just to be immediately kicked as soon as the leader inspects them.

Edit for clarity: That also wow gold means that we're not planning on having any pre-set restrictions, though again, plans could change.