Its Pre-season.... So much of it is vanilla that I really don't see how anything is really be affected. Also a WR has choices to make regarding how a DB / D reacts to the Offense. If he did give out some info, all it would do is possibly change the way he appraoches the route he's running. If the DB cheats one way or another its his job to exploit that.
Here is a typical Day In a Life
Woke up, fell out of bed
Dragged a comb across my head
Found my way downstairs and drank a cup
And looking up, I noticed I was late
Found my coat and grabbed my hat
Made the bus in seconds flat
Found my way upstairs and had a smoke
And somebody spoke and I went into a dream