Plus, you will learn to think faster to fill the dead air (at least how to think up BS, if not actual content). Trust me, it is worth it to learn how to speak without using "uh" and "um." Granted, doing it in front of people is somewhat harder, but the basic idea is the exact same.
Why would I want to fill the silence with BS instead of a filler word? at least with a filler word like "uh" or "um" I'm not BSing people.
A griefer could then report you, so your solution isn't ideal.
What's a griefer?
http://en.wikipedia.org/wiki/Griefer basically someone who does things purposely to cause other people grief. They enjoy making people upset or mad, and will take the slightest thing as an excuse to start causing you grief.
"Take that, you hostile sons-of-bitches!" -- James Coburn, in the finale of _The_President's_Analyst_