Safety?

Suppose an offensive player is preparing to catch a pass, and the reckless deep defender is charging at full speed at said player and flying disc.
If the offensive player judges that their safety is at risk because the defender isn't paying enough attention to where they are going (possibly because they're watching the disc, possibly because they aren't thinking of safety) that they can step out of the way and call a foul based on dangerous play?
I would hate to think that they have to get hit and possibly injured in order to prevent a turnover.
I have also seen this play from the other side - the offensive player charging backwards to go after a disc and the defensive player shying away.
It's often a much smaller girl and a big guy...
If the offensive player judges that their safety is at risk because the defender isn't paying enough attention to where they are going (possibly because they're watching the disc, possibly because they aren't thinking of safety) that they can step out of the way and call a foul based on dangerous play?
I would hate to think that they have to get hit and possibly injured in order to prevent a turnover.
I have also seen this play from the other side - the offensive player charging backwards to go after a disc and the defensive player shying away.
It's often a much smaller girl and a big guy...