My 4 and 7 year olds do, my 10 month old doesn't, and I'd still like to be able to go to the library (and yay, I can, because we have nice libraries here that aren't full of aggressively shushy weirdos). Plus _I_ want to be able to talk in a library, about what books we want, about what words mean, about chess moves, whatever. It's just wrong to exclude people from a space because you want a free, quiet office, and I'm glad that more and more libraries agree.