Things aren't actually like that. If someone's work schedule doesn't allow him to respect the forum's and campaign's rules, he should look for a campaign more appropriate for his schedule and posting behavior. But not to engage in burst posting. If you'll look at the
Unofficial list of (official) Bitcointalk.org rules, guidelines, FAQ, the penultimate rule states the following:
32. Posting multiple posts in a row (excluding bumps and reserved posts by the thread starter) is not allowed.
This covers also burst posting.
In your case, if you don't have time Mondays and Tuesdays, you still have 5 days of the week to meet the 15 posts requirement. The problem with that mentioned user is that he makes almost all his posts Sunday mornings in order to meet the 15 posts treshold, practically making burst posting for achieving the number of 15 posts.
I don't understand why some members are going around checking everything that other members are doing, its like post police. I'm sure the campaign manager is looking out for anyone doing the wrong thing here.
This means that users give a hand of help to the campaign manager and to the forum as a whole. As some report spams, scams or plagiarized content. Others may report campaign users breaking the campaign's or forum's rules.
Of course, the campaign manager also should look for offenders, but let's remember though that he is only human and just 1 person. When you have to look after tens (sometimes hundreds) of users engaged in your campaigns, you may not notice always all the offenders. That's why a hand of help is always welcomed.