@Aaron1351
Yes...lots of Hosts reporting an increase in these.
You don't have to hit the "Decline" button on an inquiry. Unfortunately, Airbnb doesn't make that clear and shows 3 buttons to a Host. It makes it seem like you have to choose one of the buttons...you don't. Since you don't have to hit decline, it won't affect your decline rate.
Respond to An Inquiry
https://www.airbnb.com/help/article/241
Only a trip request requires your to accept, decline or send special offer.
Flag the Message
Just answer the original inquiry within 24 hours to maintain your response time. Once you realize they are being evasive, or ask you for a video of the property, just respond and say that is not permitted due to Airbnb's Policies and click the 3 dots on the message and then "report this message" (flag icon). Choose I think I'm being scammed.
Reporting the message stops any further communication (and waste of your time). In a few days, you see this in the message thread: