I don't think Draxis knows too much about hashing.
Collisions (ie, two differing blocks of data that produce the same hash) are so supremely rare that a big deal was made of it in the crypto community when someone managed to find a way to make MD5 collide. The method was impractical, of course, and IIRC, only a few bytes could be changed. This was with a small dataset. Creating collisions out of larger chunks would be infinitely more difficult.
Now, out of OT mode...
If SE5 would only be sold on Steam, I would not buy it. In fact, I'm going to wait for the first reports from the community-- if SE5 has any crap in it, I won't buy it. If it's not portable as SE4 is, I will think twice but it's not a game breaker.