This is an ongoing debate at my company. We run massive Adwords accounts. I need to automate adding or changing query string parameters on large numbers of keywords. Our SEM team is nervous that this could cause the Adwords editorial staff to disable large numbers of keywords while they review the changes (effectively killing traffic).
I can understand why changing the domain or page in the URL might cause this. But changing the query string should not, I would think.
Can anybody confirm/deny this possibility?
As long as you only deal with/update the keyword destination URLs (and not at creative level) it won't impact your keyword statistics or quality score.
Hope that helps.