If it keeps going on like this, this forum will become obsolete and it will be just a cash cow for bounty hunters coming from underdeveloped countries...
It pretty much has become obsolete for any solid discussion and the situation will only continue to get worse the longer nothing is done about it. However, two sub boards were created to try have some sort of safeheaven from spam here:
https://bitcointalk.org/index.php?board=250.0Signatures do not show in there and posts are not counted towards activity so it is largely useless to signature spammers and farmers (well apart from getting merit I guess).
Are there going to be imposed any rules to stop this?
Punishments should be put on the bounty managers/campaigns that cause all the mess in the first place. If they are required to actually do their job and only pay for quality posts then the forum would be a much better place, but at the moment campaigns can get away with doing absolutely nothing about spam and until they are forced to run their campaigns nothing much will change.