That will only work if the LRM spamming player is stupid enough to attack the scouts, while scouts are only useful at killing LRMs.If you have an equal amount of resources invested into scouts, the LRM players will just ignore the scouts and kill cap ships, light frigates & buildings, then switch to building everything but LRMs making your army of scouts just as useful as those dead LRMs.If you don't invest into a lot of scouts, the LRM will easily kill the rest of the defense then with their number advantage will be able to defeat the scouts.
I like how this response completely neglects to consider that the strategy of ignoring threats to your LRMs is probably about as effective as an ostrich sticking it's head in the sand: your LRMs can try to ignore the scouts, but you can be damned sure the scouts won't ignore your LRMs.
"Hey, where'd my LRMs go?!"
...maybe you should've paid more attention to those scouts, hm?
*Edit*
Cassie's Dad: Um, the point about teching to Flak isn't the cost. The point is the TIME it will take for you to tech to Flak. The extra lab and research required gives them that much more time to build a horde of LRMs. It's a race against the clock, not the bank.