“I spent a whole day trying unsuccessfully to get my passport so I could go to Eretz Yisroel. The entire experience was a bracha levatulla.” (Weiser)

"Despite the fact that we don’t have anyone who is not a baki and therefore the Shaliach Tzibbur is not motzi anybody; nevertheless, the tzibbur must answer amein so the tefilla should not be a bracha levatala." (source)