Only posting x times a minute

You could count the number of posts the user created in the last minute and if it's > 6 redirect back.

$dt = CarbonImmutable::now();
$countPosts = $user->posts()
           ->whereBetween('created_at', array($dt->subMinute(), $dt))
           ->count();

Edit : I realize that whereBetween is totally unnecessary since I don't believe your users are able to post in the future. You can just fetch every post with a created_at > now minus 1 minute.

$dt = new Carbon('last minute');
$countPosts = $user->posts()
           ->where('created_at', '>', $dt)
           ->count();

@STEREOH - + make sure you use a nice policy object for it

And how to create this but then for multiple tables... so "if 6 items in tables x, y & z in the last minute, then redirect back".