Actually, there is a feature in the forum where you cam disable it. So the tool would be useless...
Goto Profile- Look and Layout Preferences - Dont show users signatures

I do want to see signatures. What I don't want to see is signature campaigns.
Then you need the signature campaign blocker (Blocks every user that is participating or willing to participate in a signature campaign)
And the difference between that and the software listed here is...?
Its an incredible piece of software that can distinguish between those that are willing to participate and those who dont. You dont even have to actually wear a paid signature. It just knows. It uses cutting edge AI technology to achieve this and has nothing to do with the fantastic work grue has done here.
Can we stop feeding the trolls now?
This ad blocker probably actually does a pretty good job at identifying who is participating in paid signatures, especially when it comes to higher ranked users. If someone who really doesn't want to read any posts made by anyone wearing a paid signature (despite how much effort are put into their posts or how good their posts are) could slightly modify the code to hide any posts (instead of just the signature) of anyone wearing a paid signature.
If they really, really wanted to exclude anyone's posts who would even consider wearing a paid signature then you could do the above plus add a blockchain parser/analyzer that can find the likely alts of anyone wearing a paid signature and ignore those posts as well.
I mean isnt that what people really is pissed about? The actual posts from people participating in signature campaings and not the signature itself. Because im fairly sure no one really cares seeing the signatures, i honestly dont care but of course the problem would be that if you block everyone that has a signature then you would block valuable members who do post useful stuff