My daughter is only 14 months old, and cannot form words, but she does her own little thing, which is what I assume you mean by conversant. We've been bringing her out to diners and restaurants for quite some time and there has never been a problem. She's normally just a little peach, and at the most she throws in a few shrieks of joy. If someone really has a problem with an infant enjoying her day, then they need to get lost, because I'm not going anywhere. Conversely, if my child began screaming and losing control, she would be escorted outside or into the bathroom until her outbreak subsided. Luckily, that hasn't happened. Mainly, because mommy and daddy are in tune with their child and can see when she is started to get frustrated, or bothered by something, and know how to help her keep a smile and entertain her so she doesn't get to a break down point.