Dude he's talking about the suicide ability, martyrdom.
I see where your logic is heading, but... I mean, yeah, assuming you have around 6-8,000 credits to throw about, and 30-40 supply to waste, yeah, you might be able to ice a cap ship fairly quickly. But with that same amount of resources, you could've built a capital ship yourself, or made a serious addition to your fleet.
It's a great tactic, and now that you mention it I might try it, but it's a wild-card maneuver, not a strategy. Suicide units are always strategically inferior to regular units because their damage potential, by it's nature, is limited. Units that persist have effectively, an infinite damage potential.
Not to mention that Martyrdom is what, like tier five or six?
Yeah, people will be bitching about it for sure, nobody likes losing a cap ship to scouts. But it's not going to be anybodys uber strat. I think though, that it's just about perfect for what you used it for there. It would be worthwhile to tag along a fleet of scout ships a jump behind your main fleet, out of enemy eyes... Then once you engaged and got his attention, jump in the kamikaze fleet and ice one of his cap ships, maybe cripple a second... Keep in mind that once you select a group of units, hitting 'tab' lets you select the next one in the formation... And martyrdom probably has a hotkey... So that should make things easier. I think they'd be even better at taking out other stuff, like carrier cruisers and support vessels and such. What a poetic way to pwn a carrier fleet... But you'd really have to catch somebody with their pants down.
So, not an uber strat, but an awesome wild-card. I'm sure that if a player is paying attention and knowledgeable he could probably neutralize a great deal of an assault of that nature, but it seems like if you were intelligent about the execution it would be nigh impossible to defend against it entirely. But there is no way that could be your main strategy, I mean it would have to be an axillary tactic for sure.
Glad you brought it up!