Of course, there are always solutions, but the question is whether the administration of the forum considers it a problem, and consequently does it have the slightest intention to do something about it? I have only listed two possible solutions that would automatically disable such members from having signatures no matter how much I find it impossible for that to happen.

I have been on the forum since 2015 and believe me I have witnessed a dozen similar threads discussing how to prevent bad people from doing bad things on the forum - the only thing that has happened in 7 years is the merit system which has in some ways made it difficult for future spammers to thrive, but it did not solve the problem of old spammers who retained the benefits of the pre-merit system.

It is not technically difficult to remove signatures from individual profiles because even global mods can do this, which we have seen in the case of plagiarism penalties. The question is who and on the basis of which criteria will make an assessment that someone will be punished in this way, will the removal of the signature be permanent or temporary...?