Yes you can! Here's how it works:

First up, let's open up the Dashboard. To do so, click on the extension:

The Dashboard is Scrab.in's control panel where you'll be able to configure everything you need, but in this case let's focus on Blacklist:

Blacklist

This feature allows you to upload a list of LinkedIn Profiles that you want to avoid visiting. Thanks to this functionality, we will avoid duplicating contacts and / or not contacting those who have formally requested it.

For this feature to work, you need a CSV file formatted with a column, header and the URLs of the profiles in each row. Here's an example: