Was it your intention to polarise this discussion, OP? Do people have to choose between, on the one hand, looking on lovingly at the sound of blood-curdling screams or, on the other, never tolerating any sound above a whisper? I mean, could there be a third possibility, that, oh I don't know, that WE'RE ALL DOING OUR FUCKING BEST?
I am highly aware of how my children behave in public. Usually they're fine. But, do you know what, occasionally the 2 year-old will be having a shitty day. Like today. She feels a bit under the weather due to bowel issues. BUT it's her older sister's birthday outing, which involves some time in a café. Was she perfectly quiet? No? Did I do my best, between speaking quietly but firmly to her, and variously taking her just outside the door (and wrestling with her a bit when she tried to run around - something I feel would shock you to your very core) to prevent her being a pain? Yes, I bloody did. But I doubt it would be enough for the 'Just Tell Them' brigade, of which you, apparently, are the self-appointed leader.
She's not a feral monster - she's two. She's learning. As others have pointed out, there is a teaching/learning phase. Unless you misunderstand the process of teaching and learning, you'll agree that there is a phase where the learner does not do it all perfectly all the time. Are we not allowed out until it's guaranteed that she will not make a noise?
Two things stuck out at me from your irritating posts. Firstly, you keep going on about 'removing' from the situation. Whose life is like this? I'm on a pretty tight schedule all the time, or I'm working around my older child (did she need to be removed from the café halfway through her sandwich too?). I don't often linger places with a toddler for the sheer joy of attracting your scathing glances.
Secondly, you said 'if mine had been screamers'... Oh, so you have no direct experience of a child prone to noise? But you ARE best placed to lecture the rest of us? Really? What a crock of shite. You're that parent who theorises about how to deal with difficult situations THAT YOU HAVE NEVER EXPERIENCED.
Honestly, this sort of preachy bullshit is why I can't tolerate netmums any more. It seems it's spread over here.