Fair point, we are working on a dynamic method of weighing although the fix worked thus far (8x hasing power increase within minutes on SHA algo did no damage at all to the chain and a few weeks earlier a scrypt pool with 51%+ forked resulting in just that their miners lost some mining time again with no consequences to the chain) we are aware that fixed factors are somewhat unreliable in long term.
Were these attackers actually being dishonest (not mining on top of the chain with greatest difficulty) ? Or were they just flooding the hashing power?
Well I have no actual evidence they were malitious but an 8x spike in minutes that lasted for about an hour was not an attempt on mining sha. I can only presume they had ill intentions. The scrypt thing was an accident.