Thanks for the links.
But I have to ask my question again.
Who is spammer?
The person who holds a site with the engine for spamming blockchain or the person who reduces the UTXO set?
Your question is lame and the same discussion has already been held in the site's official discussion thread. Turns out that services such as cryptograffiti are actually healthy for the bitcoin network in many ways. If UTXOs were so bad, then an enemy to the bitcoin network would deliberately create many UTXOs to hurt the bitcoin network similarly to the stress testing which is evil. Your spam problem is an imaginary problem you created to go off topic.