Silently, yes. I judge table manners:
People who take their face to their food rather than their food to their face.
People who eat without pausing; who don’t ever put the cutlery down and finish what’s in their mouth before reloading their fork.
Elbows on the table.
Eating with their mouth open / talking with their mouth full.
Starting to eat before all have been served (unless the host / chef / cook has said ‘do please start’).
Serving yourself before offering to serve others
Reaching over your co-diners food to get to other food / condiments.
Using a fork to ‘stab’ food and sawing at it.
Not taking all food on a fork / spoon into one’s mouth in one go (sucking food off spoons / chewing food whilst it remains on a fork).
Seasoning before tasting.
Cultural differences allowing...
I would never say anything (unless a relative) but I would silently judge and avoid eating with the worst offenders.