I think burstposting isn't really a bad thing because some people are exceptionally fast readers and typers, You should probably be more leinent on burstposting.
If a user is a burstposter then they can be burstposters not in campaigns unless the posts are super constructive and on point. Most times that's not the case though. Campaigns are a privilege, not a right. Users are not entitled to be in campaigns. If they cannot attempt to follow the managers rules, then they should not try to join.
Special thanks to
TalkStar. Added all the Loan defaulters from his
LIST.