Just a spit and polish thing, perhaps Bungie should let users click the like buttons as fast as they like without making the little "you cannot perform this action again for X amount of time" thing pop up? I'm not exactly slow with the mouse and though I don't mind waiting a few seconds (gosh it's so long lol) I don't see the purpose for this feature.
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The throttles are to prevent you from indiscriminately spamming the system. They're pretty minimal right now, I don't think we're going to lower them further.