I hope the campaign manager will take some action against that user and possibility remove him/her from campaign with some warning.
I personally have no rivalry with that user but whatever he/she does isn't right and I believe such type of members should get reported to campaign managers as soon as possible.
The problem with stake campaign is that they don't want to hire someone for managing their campaign. I have tried to reach them (I won't lie lol) but failed. They have hired some spammers in the campaign (not everyone). They don't give priority to quality, they only need quantity.
They must hire someone for managing the campaign. Or at least to monitor the participants and replacing the spammer. Don't know if they ever will decide to do so. I would gladly assist them if they would look for a campaign manager or at least an assistant for monitoring the participants but seems that's not going to happen anytime soon.