There's is no rule against it (except house rules), so no: it isn't "cheating". The more important question, however, is "does it ruin the fun or does it add to it?" And the answer is, of course, highly subjective and situational.

I usually wouldn't do it, because I prefer solving my (in-game) problems myself or within the group to asking the community about a solution. I admit that there are situations where it could be fun if the community comes up with a really awesome solution and you incorporate this into the game. But that depends on the situation and the group.

So, again, don't ask yourself "is it cheating?", but "will it be fun for my group?".