No, not really. How about you prove that they aren't spam? 30k unconfirmed transactions in the
1-10 satoshis/byte range says a lot.
Sorry I can't. I have no clear definition / qualifier to detect spam and separate from good txs.
All I know is that this type of definition / qualifier is constant over time.
Why do we have so much spam shouting just starting last few months ?
If we can identify a 'someone' or a group started this would really help here.