You might want to review the factional standings chart within Eve. Particularly the standings relationships between the "pirate" factions. Further, the more you review the factions deemed "pirate" within Eve the more it starts to feel a bit like "Factions", "The CONCORD Assembly" deems socially & politically unacceptable due to various reasons.
Yet "Pirates" in the yarr! Shiver me timbers a la RL privateers gone rogue? Ehm.... I'd say not so much. Is that to say all of the "pirate" factions in eve are sparkling examples of wonderful socially progressive positive ways to live / prosper? That they wholly, one and all deserve acknowledgement and glowing affectionate praise? Not really. No doubt the toasters might disagree with me, but on the whole, within eve's pirate groupings you'll find peoples who've been deemed politically unacceptable and/or socially unacceptable. These factions then tend to be deemed by the concord assembly, "pirates".
Due to their differing backgrounds and reasons for being cast out of positive standing with Concord, the odds of getting them together for cheery tea and scones for protracted periods of time are going to be rather low. Brief one-time gatherings? Perhaps. In any serious capacity? I don't really see it.