On the one hand, plenty of blogs and forums and whatnot feature RSS feeds without making the gods of searches too angry, but take into consideration that 3 feeds of unoriginal content can be pretty risky.
If you can balance these feeds with original content, that can be okay (although you should consider letting one go), but if that’s the only way you keep your website updated than that could be a problem.
SEO is anything but exact science. A colleague of mine likes to say it’s 1/3 intuition, 1/3 superstition and 1/3 pure ambition :tongue: