I haven't done it personally, but don't see it as a problem with some random thoughts tossed in to muddy the waters a little.
Will the added weight be a factor in keeping your jacks reteacted? Might be on jacks that are raised by springs only. It doesn't take much movement to trigger my jack(s) down alarm. If they are electric or have hydraulic actuation both directions it shouldn't matter.
Will there be much difference in the life of the attached wooden pads by being exposed to all sorts of weather, and does it even matter with the minimal cost and ease of replacing them occasionally?
Anything else would be just stupid questions on my part. If you think it will be a benefit for you, go for it.