I don't think it's a issue. Compare the auto generated adsense code from the module with an actual ad code generated from your adsense account. They should be exactly the same (except for some parts like the Channel name and adspot dimensions, obviously).
If you want, post the adsense ad code generated (in that module) here.
Btw, the 'Ad Revenue Sharing' addon / modification for vBulletin also employs a similar technique (of asking the publisher ID only and then automatically generating the ad code), and many Forums have implemented it without any issues.