What's the reason for the time limit to 'un-like' a post?

[bartv (Bart)]

Our users are asking why they can’t remove a like after the post undo action window mins has passed, and I find I don’t have a good answer for them. I’d be curious to know why this choice was made before I change the default value? I’ve grown to trust the default Discourse settings as sensible, experience-based values so I’m reluctant to tinker with them without understanding the consequences first.

Are there any risks when I set this to a high value?

Thanks!

[codinghorror (Jeff Atwood)]

You can pretty effectively grief people by liking and un-liking forever. You could also get mad at someone and rage-unlike all their posts. In general unlimited user actions are dangerous as a rule.