Recently in GDSE the spam increased a lot; there is company or person who is spamming about keto diet all the time; I flagged and downvoted a lot but isn't there any other way to stop this?
Thanks for your concern Design Phoenix. Spam can be very annoying and potentially hurtful to the site and the community.
Luckily, we have some automated tools at our disposal to deal with spam. These tools look for bad keywords, bad urls, blacklisted sites, etc. Keto and Diet are definitely among those keywords.
We actually have a chat room where this automated system posts everything that is automatically flagged as spam: The Spam Blot. As you can see, it's quite a lot, more than any one person could deal with.
If you want a more in-depth analysis of the automated anti-spam activity, you can find a dashboard here. It looks as though the amount of spam has not really increased over the past three months.
One thing to note though is that the time to deletion has increased somewhat during the past weeks. This might be due a lessened user activity overall (maybe because of the Easter Holidays?). This might explain why the users that are still active, are seeing more of the spam.
This is definitely something we do need to keep an eye on. I'm guessing the Time to deletion will go down by itself again once user activity picks up. But if it doesn't, we'll maybe have to look into taking additional steps.
PS: There's no need to downvote spam. Flagging automatically does this. And once an answer is deleted, the change in rep is removed with it.