What's so confusing? It is just a bit of community fun. You don't have to send a greater amount, so it's not like it matters to you.
The only responsibility was on the person sending it to you to have some idea that you would 1. Find it funny and not bothersome and 2. Send it on to someone else.
Your comment about the point of crypto being to not have to trust anyone also makes no sense as it relates to the protocol and ownership of your own wallet and funds, not to what people and communities do with their money or resources.
I disagree. Such behavour develops more scamish vulnerability of the person. One day it is "I will send you sth, send it further, it's a nice game" and another day it is "Lend me some money, I will send it back later".
From me - big NO NO NO.
'Consent' is a wonderful word.
So is 'gushing'.... but that's not relevant right now.