poster 1: i'm mad about this problem
poster 2: have you tried the widely available solution for exactly this?
poster 1: no i'm also mad about the solution
don't forget:
poster 1: i have a problem doing this thing
poster 2: what if you just didn't do that and did something completely different instead?
Me: I need to solve problem X using Grobble
Poster 1: Don't use Grobble. You should use Frobble
Me, 1 week later: I need to solve problem X using Frobble
Poster 2: Don't use Frobble. You should use Grobble
