However, if the node title shows that all three posts came from the same person/IP address I personally would decide that none of them are genuine and not bother replying.

This anon troll typically posts replies. You already know from previous posts that this is a troll, and you don't need to reply.

Do you really think there are people who think "I'm going to reply, oh, no, he may be a troll, I don't know from this posts, but lets browse through old posts and see if there's a matching IP address"? Come on. Half of the people on Perlmonks can't even read the post they are replying to carefully - people aren't going to remember IP addresses, or bother to do crossmatching. And even if half the people on PM do, it's still not going to work - the other half will create the troll droppings.

Anonymonks monks having their IP addresses listed aren't really anonymous, are they?

though I still don't understand, and nobody AFAICS has tried to explain, what the big deal is about creating an unofficial "anonymous" login if one needs that

What's an unofficial "anonymous" login? And, whatever it is, what's keeping trolls from creating it?

Linking trolls with anonymous monks is like saying "See, there's a notorious driver around who often drives too fast around schools. And he's driving a red car. Let's equip all red cars with a siren, so we know he's coming".

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