I found this article:
Per what both of you said, it's overkill because it has caps for filtering high frequency noise as well. He does have some good guidance in there about 10uF being the recommended max. (That said, if a 47uF one pops out of my pile of caps first, it's happening.)
Hooking a scope up isn't practical, the event happens way too rarely. But I suppose my coworkers would be impressed having my ridonculous 1960's era scope whirring by my desk all day 
Who cares about practicality.
From what you're saying and what I'm reading, there's no harm in hooking up a cap, and it might be sufficient, then again, maybe not. Right now the best way to find out is just to try it.