Am I sometimes too apologetic to others about my toddler?

How old is your toddler? If she's under 2 1/2, then I'd apologize if she hurt someone or disturbed them, because you're modeling a proper courteous response. If it's a toddler friendly area and her behavior is within the expected norm (pushing a chair around quietly, not running into anyone or breaking/ramming anything) then stop worrying about what other people think. I like to provide lots of opportunity for my children to get their energy out in an appropriate forum (parks, playgrounds, indoor play areas, etc.) and avoid areas where I know that she doesn't yet have the understanding and self-control to handle (long church service, fine dining, etc.) As she ages, the children's area of the library is a good place to start practicing appropriate behaviors (not screaming or running inside, taking turns, etc.) When your daughter tried to get on the computer and you and the other parent had a dialog about taking turns and making choices, you were modeling the thinking process you want your child to learn. I can't use it right now because someone else is on the computer, I have already had a turn and now it's someone else's turn, if I want to play with something else, I can't still play on the computer and someone else will take a turn. If your child is older than 2 1/2, you should gently remind her what is proper behavior and have her do the apologizing when she disturbs other people and remove her if inappropriate behavior continues.