Aren't there any legal protections against this? That the company can keep your property by inserting a single line in the terms and conditions? By extension,

Aren't there any legal protections against this? That the company can keep your property by inserting a single line in the terms and conditions? By extension, if one opens a car oil-change shop and puts in a line on page 7 of the terms and conditions stating that you they own your car now, there have to be some legal protections around it right?