Obviously the mechs would have to be a bit run down and stuck together with Gaffer Tape and chewing gum, possibly fall apart, explode and overheat like hell... But I think It would be nice to have the option to go REAL solo / Lone wolf with a bunch of miscreants rampaging around...
I was thinking that when CW comes out and everyone is earning these loyalty points to unlock new bits of kit and perks for their individual Houses \ Clans \ Merc units the Pirates could earn points to unlock salvaged weapons and Mechs. There would only have to be a limited selection of Mechs to start with or even just the one you could customise as you went along becoming the most notorious scallywag in the universe.
Also with CW, when the fighting starts and planets are won and lost the Pirates could mount raids on colonys to steal resources or weapons / Mechs and who ever controls the planet would have to defend the base from them... All in all I think being a Space Pirate really appeals to people, plus being Piratey is COOL

Who be with me, Yeeaaarrghh!!!