Yeah... unless you are 110% sure what you are proposing will properly deal with it... don't. All the attempts with killing 682 are examples because they just made the damn thing more resistant to various kinds of lethal attempts.
Besides... not ALL SCPs are there because they are dangerous. Some are pretty damn useful and more than capable of helping people, while others are there because they don't have a choice, like 085, 053, and 1192. The reason they are SCPs is that they are anomalous, things people wouldn't normally understand.
Hm... wonder what would happen with an SCP if they are finally understood; how they are formed, what causes them, the works. Do they just become normal things now, or are they still SCPs, but given a different denomination, like intellexerunt?