How many times have you been in a meeting and you hear "Somebody should do this"? Of course they aren't a somebody. I am fortunate that everyone I work with is a somebody. They get things done.
I'm convinced that in any meeting there are participants and pontificators. Pontificators are easy to spot. They "we we" all over themselves about how wonderful they are and toss out lots of suggestions. When you nail them down to perform something, they fail and make excuses, usually about how it's someone else's fault (because important folks like them never fail). Unfortunately I've run into this three times in the last year. When I figure out they are a pontificator, I part company quickly.
Excuses are excuses, execution is the only thing that matters. Be a somebody.