You can access via proving you are not a robot via a small LN payment

This is a good model imo, the many iterations of spam that Nostr has suffered from over the years, could potentially be mitigated by this type of cost deterrent, think reply guy, NSFW 🔞 like illegal nsfw

Imo clients shouldn't get involved in censoring content like the Knotsi's are proposing

But the cost of entry should inhibit them

Lightning login is another great addition if you don't have it, SN obviously leading the way