If they thought that taking in too much DNA could be a health risk, or something like that, they might limit the technology. I mean, those strands of DNA have to take up some space. If there was limited space, then breaking that limit could be deadly.
But since no limit is evident, then taking in dozens and dozens of DNA strands might not be a risk.
Then again, it may just be an extremely unlikely risk that, even though it's possible, they don't do anything about. Like having your consciousness be catapulted to Z-Space when in a small morph. Like what happened with the mosquitos.