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?