Technically...Locke didnt 'blow' up the Flame, because he didnt actually know the repercussions of Enter 77.

He was prompted by a chess computer to enter a command in the event that hostiles were in there, but didnt know what the result was going to be. In fact Id say it was detonated remotely, because if kaboom was imminent the computer should have said something like:

'Get your arse out of here...NOW"...but there was no urgency to his departure. Says to me, someone else detonated it; someone watching on that cctv camera...

Just the same, Id say Locke's computer previledges should be revisited.

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Sorry...I think my Kharma just ran over your Dogma...