Solosanz caught a user behaving like this a while back:
(AndySt) The next abuser of stake campaign? I think it's a bad habit for signature campaign participant. This campaign pays participants to spread awareness on their site which should be done evenly over 7 days, but this way I believe they have hired the wrong people.
I think if campaign managers see such shit posts that were edited, they would have one more reason to not count those posts for weekly payment.
If it happens to the 1xbit campaign, then let it be because I don't think we should help the scammer who was scammed by his signature participant. For other campaigns, yes I will agree with your suggestion.