There is really not a lot of yeast in Krausen...just wort protein and hop residue, some yeast but not enough to effect fermentation. Your beer should be fine.
Bottled: Mexican Cerveza, Irish Stout, some Blue Moon clone, Pepper Ale, Full Hard Lemonade, Russian Imperial Stout, My first attempt at Mead (JAOM), Black Pearl Porter
Kegged: Blue Moon clone, Irish Red Ale
On Deck: Citra Hop Bomb (small batch) and Cream of Three Crops
Never underestimate the power of stupid people in large groups.