Would this cause my tire to wear?

ok tolday i was under my car looking for a leak well i looked at my control arms and there wasnt a nut on the passengers side and on the driver side there was one but it wasnt tight. Then i looked at my passenger side tire and it almost bald in the middle. The drivers side is fine, and i do not do any burnouts anymore and these were put on at the same time?
 
could be from over inflation...but probably not. it could definetly cause a problem. i would put some nuts on there and tighten them down and take it to a shop to have them check the alignment in the rear...hopefully your tires are under warranty