What if someone took your username and I mean instagram?

[Jimmy K]

If they were trying to contact me or harass me, I'd block them. Otherwise, I'd just ignore them. No point in being offended unless they're really trying to offend you, and even then, if you can be done with them by blocking them, that's the better route I'd think. If they're trying to point out that they've copied your info, they want your attention... the best thing you can do in that case is just ignore them. "Don't feed the troll" as the saying goes.