There was an user suggest to disabled register a new account and now someone propose to freeze the accounts for 24-48 years something like newbie jail, however theymos don't like to bring the newbie jail back.
Fortunately I didn't use that kind of bots notification, so I didn't get bothered by these spammers. You can temporary unsubscribe the bots if you don't want to receive notifications from these spammers.
Limiting newbie participation is very harmful for a community. Newbie jail will never return: I consider the newbie-jail period to have been extremely damaging to the forum. When barriers to participation are too high, then the best people often just won't go to the trouble of joining, and the people who are willing to jump through the hoops are often people who aren't good for the community: people with nothing better to do, scammers, get-rick-quickers, etc. Having a permanent newbie jail policy would improve things a lot in the short-term, but would end up being a fatal poison to the community.