One can still "blame" tourists for littering, irrespective of whether cops can enforce the rules or not, because it's a lack of civic sense, a lack of understanding of the importance of preserving such things. That sounds like a good enough reason to point fingers at these tourists.
Complaining about tourists is something every place that gets tourists but also has people that just live there does. It's not useful and doesn't bring us anywhere, therefore the added value of doing it some more is just non-existent.
The behaviour of tourists is what you get when you get tourism. If you don't like it, don't have tourists - if you do have tourists, make them follow the rules that you want to see.
>>The problem is you will just point fingers and not do anything about it.
How do you know I will not do anything? Do you know me personally? I can do something and still point fingers at the tourists.
My original point was about whether you can blame tourists or not. I see your point that the inhabitants also need to take care of their land, but you seem to have strayed from that discussion into something else.