That's what I'm screamin. Those that use Active Sky, and all the different versions of it, are not going to get the same weather as those that use the default FS weather, or any other weather generating client. So I'm thinking it would be difficult for this to work under those circumstances.
In most cases, though, you're going to receive similar symptoms in the relatively same area. If there's a thunderstorm in ZDV's Sector 22, then yeah, most pilots using some sort of weather software are going to get the effects of it, even if the cells of the storm are scattered in different locations in different softwares. PIREPs aren't that critical to VATSIM flying, anyway, so advising pilots of PIREPs has more to do with realistic procedure than anything else. They don't require pilot action and those regarding hazardous conditions serve as precautionary advisories only.
Furthermore, in the real world, weather is moving all of the time. Turbulence, which is probably one of the most reported phenomenon in PIREPs (at least in my experience), can occur everywhere, even in spots with no depicted precipitation. The same principle applies: They don't require pilot action and those regarding hazardous conditions serve as precautionary advisories only. Controllers record the specific location of the PIREP in the report, but generally speaking we pilots assume a range as to the location of where that phenomenon may occur.
If there's a moderate chop PIREP 10 miles west of FNT, then I figure I may encounter turbulence somewhere generally immediately surrounding FNT. Then again, I probably wouldn't be flying in the first place, but you get my point. Either way it's a courteous advisory.