Disable automatic shortcut creation for network mounts

I just wrote a script that searches for every samba device in a network and mounts all shares it can find on those devices. It works just fine, but my launcher sidebar became quite unusable.
I know I could manually unlock them all, but I don't want to do that every time I update the shares.

I also find it quite annoying that my file explorer (pcmanfm) displays every mounted share in its own sidebar under places. I couldn't find an option to remove them.

How can I disable the automatic creation of all those shortcuts?

I'm on Ubuntu 16.04 and I don't have nautilus.