To mess with a scammer, just forward a scam email to firstname.lastname@example.org:
Re:scam can take on multiple personas, imitating real human tendencies with humour and grammatical errors, and can engage with infinite scammers all at once, meaning it can continue any email conversation for as long as possible. Re:scam will now turn the tables on the scammers by wasting their time, and ultimately damage the profits for scammers...The aim is to waste the time of scammers, without wasting a second of yours. When you forward an email, you believe to be a scam to email@example.com a check is done to make sure it is a scam attempt, and then a proxy email address is used to engage the scammer. This will flood their inboxes with responses without any way for them to tell who is a chat-bot, and who is a real vulnerable target. Once you’ve forwarded an email nothing more is required on your part, but the more you send through, the more effective it will be
Here's an example of how Re:scam toys with a scammer, starting after the bot responds to the initial scam message:
...and this just keeps on going, until the scammer gives up (and after they've wasted a bunch of time). Brilliant.
Learn more at Re:scam's website.