If a new poster comes on here and their first post is "I hear Player X is going to be dealt to Team A tomorrow", then that's one thing (though, that actually became a trade way back in the day). If someone who is known around here says "I'm hearing the deal for Player X is almost done", then that's a different story. It's no different than a media member on Twitter throwing out a name that they've heard from multiple sources (which is quite common). You really can't say "yeah, it's always good" or "no, it's always bad", because we both know that's not reality.
In this case, the names that have been tossed around (Salinitri/Lynch)... this isn't the only place I've heard them. So, I'm more comfortable saying "yeah, it could happen" and I trust the people who have said things. Maybe neither one happens. Doesn't mean they're not credible, though. Personally, I wouldn't throw a name out there unless I'm confident it'll go through. I'd imagine others are the same way, too.
Then again, if you don't like a poster, you might think they're full of it no matter what, so this could all be completely moot.
Frankly, a whole lot could happen before the season starts next week, or nothing could happen at all. It's TBD.