[Plugin: Growmap Anti Spambot] Change Checkbox Name?

I recently started using Growmap Anti Spambot Plugin. And I see increased spams now… but I am ware about the field “Checkbox Name”. And it says “You can change this if you find that bots have started to target your blog again”.

So what should I enter there? Is there any syntax to follow or can I enter any random name?

Thanks!