Well
@size26s isn't the Meso Commissioner, he doesn't make the rules here, he is just stating his view on this and (hopefully) limiting the number of PM's he gets regarding this.
That said, Size26s DOES speak for many of the members in the community regarding PM's asking for sources. Many of us discourage members from asking for sources due to the potential for scamming via PM's! It would be so easy for a scammer to encourage PM's for sources, and then scam you using that method.
It is against the rules, however, for members to send you unsolicited PM's offering you gear. That should be reported if it happens.
Also, be wary of members who seem WAY to eager to help you with a source. If they are THAT eager to "help" you, they have other motives for doing so.
Your best bet, as always, is to stick around, read, participate, and read some more! There are other sites (source boards) if you are simply looking for a source and nothing more.
Good luck to you, sir!