A toddler literally has no sense of morality, and literally does not understand the difference between right and wrong.
At that age we are biologically programmed to be wholly selfish creatures.
The woman was an advlt and from advlts I expect civil and honest behaviour.
Stealing is wrong. It is even more wrong when done to people that are easy targets because they for one reason or another can not defend themselves.
The elderly, the infirm, crimes commited against the vulnerable groups are more heinous than crimes committed against someone who is perfectly able to punch your lights out should you get caught. So yes, cowardly and despicable.