Declare blanket wars to many corps (check)
Emphasize that you are “heroically fight and lose against 5 vs 1” even you were the one declaring wars (check)
Abuse wardec mechanics to evade 2 weeks cooldown before your HQ goes down (check)
OK you are all good PIRAT , that is a sweet spot of how classy can PIRAT be, good to go 
WarHQs should be one at any given time for each warring side and succesful destruction should really give defenders a chance to have 2 weeks time off. Right now this is not the case. So I am calling it an abuse.
When i was pointing out one HQ at any given time you were just saying :