Ah... but there's the rub.

Define "the community."

Do random GH accounts count as "members of the YC community"?

Sorry, but unsolicited contact, much as I hates, HATESSSS it, is a classic component of any business, and has been, for many decades. I don't think it would be appropriate for a business organization to prohibit its members from engaging in "cold calling," of which, UCE is really an example.

Using the YC branding/name, however, is a different matter.