I use disposable e-mail addresses for the same reason: spammers. Most of the time websites demanding an account sign-up or e-mail before you can proceed don’t actually need it for any reason other than adding you to an e-mail list (without your permission) or selling your personal information to a 3rd-party (again, without you permission.)
Personally, I don’t see much value for the user from articles like this. There are other solutions for preventing spammers without putting yourself against the user. I’d also encourage you to consider whether you really need that e-mail at all. E-mail addresses you collect from your users without demand have much more value anyway.