That's not the type of exploit Kryo was talking about. Yes, that is technically cheating, but overall not that big of a deal. The scenario this is intended to defeat goes something like this:
Ooh, I found a class 10 with a 700% manufacturing bonus on it. Save/reload until I get a + production bonus when colonizing. Destroy colony, repeat until I get another + production. Repeat until I have 300% or more production bonus on one planet, simply from colonizing events. Or do the same with research bonuses. Add in +PQ events for a seriously large planet to boot.
The same could be done with soldiering, planetary defense, or influence - all of those colonization bonuses are empire wide to cause even more cheese-related chaos.
Each iteration of this exploit would only cost IIRC 68bc and 1 million people, plus travel time for the ships. Not a bad price to pay to get one planet with more manufacturing or research capability than most empires.