For kids at risk it is good to share your struggles. This way they won’t look at themselves as outsiders. Many times they feel that everyone else keeps everything and walks around with Shivisi-Hashem-Lenegdi-Tamid on their mind, just as their Rebbe led them to believe, while they themselves actually have their own desires. This makes them feel like they can never participate. When you share your realistic ups and downs, it can bring them closer by showing that there is room for them and their struggles, too.
In the case of Kiruv Rechokim, I don’t see how this will be a benefit. Sure it is good to understand that we all have struggles and week moments. If they know that it is something that you are working on changing is fine, or even great. On the other hand, to see Halacha being defied is counter-productive.
However, in the case of the OP, when you go to the next Kiruv event, why don’t you try sitting down on the other side of the table?