I really think that commenting about a provider is the hobbyists pervue, not other providers.
A couple of the comments are rather snarky, and why the hidden messages sent via PM. Why not post them publicly- or is it a profile that only she has access to? One comment was incorrect as the poster is quite new and wouldn't the history of that said provider.
You think you are being helpful, but to me it looks like piling on- it says to me " look at me, I'm better than her" and "see me, I'm available"
It's just not kosher. Leave it to the guys to blast her, or send a direct PM and don't broadcast it to the world.