Nah.. many different strains produce striped seeds. I'm not sure if it's an indicator of anything other than the seed is mature.

SnStealth is 100% correct... Schwag is mostly Mexican or other Central American sativas, grown in fields, no males yanked out, everything gets seedy, it's harvested, allowed to dry for a few days and then it's compressed into bricks and shipped out... It gets mildewy and moldy and starts smelling like crap.
That doesn't mean the seeds can't produce some good smoke if it's grown with care.
You might just be surprised at the end.