This is nothing new, when ever I see Siddurium or Chummashim lying on the table around me when I come to shul before davening. I put them back on the shelves. I only do it for the 5-10 tables near my seat.
Once one person does a few, others will follow and soon they are all back on their shelf. The problem is that it may be hard to find the right place, so if they are labeled with a shelf number or color coded it increases the possibility of it getting done. I have seen custodial staff putting them back.
You can either complain about the problem or do something about it. If you put just a “Few Seforuim” back others will see and follow suit. But if you do not put any back, nobody else will.
You are either part of the solution or part of the problem.