Post bursting have been of major concern in the forum and I observed that most of the people that does post bursting are those with high numbers of post count per week in their campaign and newbies too and this post bursting is mostly noticed during the ending days of a campaign as some users does so in order to meet up signature post quota to get paid however, I suggest there should be a restriction that should be placed such that if a user makes a post, they will not be allowed to make another post until like 10 minutes or more, by so doing post bursting will reduce drastically but as for spamming, once a spammer is always a spammer so just like others suggested, report to moderator is your friend.