It's possible that these balloons could also interfere with imaging infrared targeting systems that exist on some missile systems, namely cruise missile types. These systems are passive in nature, making the missiles that carry them harder to detect. They match imagery or 3D models of the target object against a database to positively identify it and make their highly precise end-game attack run. This is all done autonomously. The presence of the balloons could possibly confuse these systems, although that would likely depend on their level of capability.