I have no issue with families with young children in strollers or members in wheelchairs/scooters waiting at a table. It can be a struggle for some to get in and out of a wheelchair or scooter. Plus, better than them clogging up the lines in a cramped place like Casey's. We stand in line to order and then one of us goes to find a table while the rest wait for the food.
Most of my trips are solo. I have no problem offering to share my table. What I do have an issue with is someone deciding because it's just me, I should give up my table and/or seat to their family members. I actually had a woman, while eating by myself at Casey's, ask if I would finish so her family could have my CHAIR - they'd already taken the empty chairs from my table. She kept looking at me with that "hurry up and finish" look, so I proceeded to eat slowly and enjoy my hotdog.