[SOLVED] How can people create an empty cart without add to cart button

-- url of the page with the problem -- : www.dfcgrootverbruik.nl/shop
-- HikaShop version -- : 3.1.1
-- Joomla version -- : 3.7.2
-- PHP version -- : 7.0.20

Hi,
In our shop only people with an account can see prices, they are using an ACL on the price. Others would normally see a free price but we changed that to an icon and a link to another webshop.
In the shop we have hidden the add to cart button by hiding the add to cart button for free products.

For some strange reason there is somebody/something that is creating a lot of empty carts with no registration.
It looks like this :

Hi,
I've updated to the last version but still they find a way to add "nothing" to the cart and leave.

It would be nice if the IP address is added to the list of carts, then it's easier to try and find these jokers and stop this useless behaviour.
Any tips on that ?

I'm working on the robot.txt file but it's a bit hard when you don't know who to block So it's going through logfiles etc. to see if I can find anything.

Thanks for any tips/suggestions.

Hi, just a quick update for anyone having the same issue :

This is what I still see in the access logs:
msnbot-207-46-13-61.search.msn.com - - [12/Jul/2017:14:17:35 +0200] "GET /shop/product/updatecart/add-1/cid-10194 HTTP/1.1" 303 20 "-" "Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)"

Even while having the suggested line in the robots.txt file.

I think that stronger measures are needed

Maybe somebody another tip on this?

Hi Nicolas,

I've tried all the polite ways to tell bingbot not to put anything in the shopping cart but nothing helped.
So I had to block it through .htaccess and that worked.

Thanks for all the tips, I will mark this as solved.