Samizdata - 11:20 am on Jun 18, 2011 (gmt 0)
I'm also concerned googlebot may report that my site may be "up to something". Thoughts ?
No need to be concerned.
Google will take your CSS (and anything else disallowed in robots.txt) by other means.
A bot with a generic browser user-agent coming from a Google IP is one of them.
There is no effect on rankings.