It will harm the bottom line. When user experience isn't taken seriously, the effects will be felt - yes at the bottom line. Facebook is now admitting it has a problem in the "cool" teen department. Because of Facebook's privacy blunders, it has put itself in the spotlight whenever a change is needed to the ToS, DUP, or Privacy Policy. Does anyone really think that it costs Facebook less to deal with these issues (dollars and time)? Google will not be an exception. Someone, will come along and fill in the gap to make their marketing costs even more interesting.