So, my opponent had a win on board. All he had to do was move his Bound by Moonsilver from my non-flier to my flier, and he could block and then deal lethal next turn. However, he overlooked that, let me attack, and lost. So, what now? Do you tell him, or not? I couldn't really tell by his plays if he was a newbie or not. I can see arguments for both. In real life, I would probably mention it, since face to face you can probably manage to not insult them. Online, I chose to keep quiet. What would you do?

Uppps.

Just now, I drafted my first Bound. Guess what? You can't move it instant speed. So I'm kinda glad I kept quiet.

I know you play online so ... shrug? If it was at the store, I'd mention it.

I'd mention it, or ask why they didn't. I tend to ask when I don't know why my opponent did something and personally don't mind people asking.

The other day I played Press for Answers and then Erdwal Illuminator and my opponent asked why I didn't reverse the order. My answer...playing too fast and not thinking. In reality...I had two Rise from the Tides in my hand, a Pyre Hound with two counters on it, and four Spells in the yard...knowing I was gonna get 5 then 6 zombies over the next two turns and a 6/7 trampler made me a bit unconcerned with maximizing play.

Unless I'm getting Vibes of salt, or they are very new like 1st or 2nd FNM type new I will leave it be unless they open the door. if it is someone I know I always polity try to suggest other lines.

Yeah, depends on the player for me. Super new players I will help them. Players I know should know better I won't say anything (they usually realize anyway)

The best one ever is the three people that I sometimes play that get super salty. I love pointing out their misplays to tilt them even more because their attitude just makes me miserable while playing Magic.