I don't post trades for two main reasons:
1 No one has my trade plan or are they looking at my charts so it might make little sense to another and could distract from their own trade.
2 Posting a trade tends to make me more emotionally invested in that trade and I find that counter productive.
In the same vein, I seldom pay attention to others trades unless they do something that really stands out like taking a series of entries counter to the trend (in my time frames) or multiple adds to losing positions. It's not for me to judge what someone else does but those things create cognitive dissonance and that's a distraction.