Is it that risky? Talking, at least, as a somewhat knowledgeable person, which is the target of such web tools.
I usually have no problem using my email address to sign up for things. And yes, I do know that emails will come.
Sometimes they are actually useful and I keep them. Often, I don't care and I just unsubscribe. I some not-so-common cases, it is spam, in which case I mark it as such and I am never bothered by it again.
Sure, it's a bit of extra work. But I would not classify it as risky business.