I think Alias summed it up. It's a gigantic waste of time.
It's almost impossible to locate these people without an address, social security number, etc., especially in larger cities with multiple people with the same name.
If it's a company unit, I'll definitely look them up. But even this backfires since some people rent the unit in their business name and fill it with personal items. Probably so they can deduct the cost of storage on their taxes.
Even if you find out information about the tenant like he/she was a doctor or lawyer, that doesn't mean there is going to be anything valuable inside. You might end up with a unit full of medical or legal records.
If you're going to spend time reading the legal notices, focus on big ticket items or patterns. Also, it's a good idea to pay attention to whether there are multiple units owned by the same tenant. This way, if you buy one of them, you can be on look out for things you might need in the other units. For example: additional pieces to a bedroom set, chairs & leafs for a dining table, etc.