Overreacting or right!?

Right just to get this out the way i don't use or have Facebook. The 12th May the day my son was born i specifically said to my boyfriends family i didn't want pictures of my son being uploaded to that app as they have too many people i don't know on it and didn't want other people i didn't know and had no contact with seeing pictures of my son. I send my family and boyfriends family pictures of him of course. My side of the family respected my decision and didn't upload pictures of my son. I don't have the app so of course i couldn't see what was going on with my sons pictures. 7 months in of my baby being born and i finally found out they went behind my back on that decision and have been uploading the photos i sent them of him to Facebook now i've seen random people i don't know, people i don't like and don't interact with commenting on those pictures. So they never asked for permission and i never knew what was happening to pictures of my son for 7 months. Me being his mother never knew his pictures where being uploaded to this Facebook until my mum noticed. Now that has very much disrespected what i said! Am i right for being pissed about this!