Yea the basic launch all your weapons and blow yourself up strategy.
Yeah, I'm not a great fan of that strategy either, but regardless of that, some missions are balanced based on it (well, strictly speaking they're balanced for lag bombing, but since that's all but gone with faster connections this is the next nearest thing), but that doesn't mean this should be made a viable strategy through retroactive changes. It's a fair enough tradeoff as it stands, destructing means no points but fresh weapons.
On the other hand though, a mission may just be so hard that surviving to do 40% of the damage on a single respawn just isn't feasible regardless of how good you are, and I don't think bomber pilots should be punished with a 0 point outcome for taking on a tough challenge like that. It's for those missions where having the flag would be good.
As an example, there's a capital-heavy gauntlet I made that we gave a good run through two weeks ago and I just finished up, and which is actually my reason for making this request. It's balanced for decent challenge on normal difficulty, making it very tough on hard and near-impossible on insane. There are 9 cruisers, 3 corvettes and 3 destroyers in the mission plus a ton of fighter escorts, and after playing it through on hard with, i think, 7 players (most of us with 1-3 respawns remaining at the end and one being out entirely), not one of us had any non-cruiser capital ship kills. That despite no AI bombers and no friendly capships being present.
I had initially reduced points for all non-cruiser capital ships to 1/3rd of their normal value due to the sheer number of them to avoid the RI syndrome, but after realizing that we'd be lucky to get the kill for even one of them, I put it back up to full for the release version. Now, assuming the flag was implemented, I'd want to go back to the 1/3rd points and activate the flag on all corvettes and destroyers because, frankly, you don't need self destruct to die in that mission, the enemy takes care of that quite nicely on hard or above. It's for this situation that such a flag would be nice, because without it players are punished for playing (and beating it) on harder difficulties instead of rewarded as the scaled points system is supposed to do.