Does attracting Reapers to a Solar System only affect me?

Scanning too much in a system attracts Reapers which case you. However, does attracting Reapers mean they only care about you or could attracting them to important solar systems actually cause harm to any planets/people in the game?

Basically, does attracting Reapers have any effect beyond the risk of a Game Over if they touch me?

No, the Reapers are already in control of these systems when you enter - scanning just draws attention to the Normandy.

If you scan too often, they'll pursue you, but they're already tearing it up in the system, so there's no additional risk to others. If anything, you're distracting them slightly.