I'm not sure I understand what you mean exactly, but the guideline that pertains to cross posting is meant to discourage duplicate posts with the same content in more than one forum.

It sounds like you are saying there is a thread in a forum other than the UA forum where members are talking about their experiences on UA, and you would like to make the UA forum participants aware of this thread. Generally speaking, I don't think any of the moderators would discourage that.