There is definitely a point to your warning, and I would say that it is not restricted to online advertisement of attainments!
Nevertheless, let’s acknowledge that when it comes to the fruits of the Buddhist path, the Buddha was very clear our task is to verify them for ourselves.
Hence, we should take this as a beautiful opportunity to at least manifest our endeavors into the path factors of right thoughts, speech and action and let a friendly conversation to roll out.
As long as we don’t end claiming and imposing our versions of the story on each other there is no harm and giving people a space to talk and reflect of what they believe the fruits of the path have been so far.
Nevertheless, it is worth advising that it has been made public before that Discuss & Discover is not intended to serve as a forum for discussions about Buddhist practice.