Posting fake items for kicks is not encouraged, obviously... such silly topics are most welcome in the "Discussions" part of the forum though, as I've gathered.

Posting an item that you're unsure of is another thing, I believe that would be encouraged provided that it goes in the appropriate part of the forum... e.g. helmets where helmets are discussed etc.

Then, there's the simple deed of thanking/showing gratitude towards the people that reply/lend a hand in authenticating an item.... to some it comes naturally, while for others That's my understanding anyway---