I dont think shadow banning newbies will be very effective in combating this. Users will not necessarily use low level accounts to make these kinds of posts. I have previously suggested that Ann threads with a post within xx time be displayed in a random order, which would effectively make bumping more than once per day pointless.
We dont know if the people behind this project are the ones financing this spam, or if it is a compeating project trying to make this coin look bad. Technically speaking, we dont know that as many people have bumped the thread as the screenshot implies have bumped the thread.
The screenshot says that people must ask at least a 30 word question, so it is unlikely that most of these posts will violate the no low/no content posts rule.
I think the best corse of action would be to make others aware of this practice and not take extreme steps to stomp it out. Trying to stomp out this activity will only create a false sense of security and result in potential investors unaware of the risk this is happening. If potential investors are warned about this behavior, they can take it into consideration when deciding to invest.