Adding multiple negatives to many campaigns normally requires adwords editor and is what I use. If however you need an alternative, negative keyword lists can come in handy.
The above video takes you through the process of adding a list of negative keywords to multiple campaigns.
As you can label your lists, you could argue that you can be more organised with the type of negative you are adding e.g. list of locations. This may well come in handy when you want to remove them (if needed) in the future.
About the author
Thomas Green is a Certified Adwords Professional and specialises in direct response marketing. He has over 6 years PPC experience and has a straight forward approach to what works and what doesn’t!