I've started (semi-jokingly) telling people I'm "pro-revenge" as a rule — it seems proactive — but I am not pro-making someone's live miserable, even if they dumped you. Here's a way to get back at your ex without fucking her over in the long-term.
From a tipster:
My friend's ex-girlfriend bought her a domain name as a Christmas gift last year, and after she was broken up with, she redirected [personal website] to Nickelback's "Greatest Hits" on Youtube. "It's like the perfect amount of cruel without crossing lines and it's fucking hilarious."
Props. (And, all together now: This is how you remind me//This is how you remind me//Of what I really am...)