IMO...
I don't see it interfeering at all. Beside the obvious - (the reel needing service), fish themselves, give off a
pulse...so I would think ..if anything, it can't hurt. And like BigBo said, plugs with internal rattles work pisssssa
I'll say this though, I've owned noisy reels..and you're definately NOT at 100% unless ALL your senses are ready. When your buddys' fishing by your side and you get a bump, you want silence right? WHY??...because you want ALL your senses at they're best. Fix the reel.