At the end of the day, everyone is here to make money as well as socialize. 

it's understandable to forcibly communicate with people you don't normally interact with. It's understandable to abuse bots to earn moxie too. 

It’s a farming method when big accounts suddenly come back here. And this is normal, you can't blame them. 

If a project gives you a high-level budget(tip allo or moxie), you don't say why did you give it to me? You can think of it as the marketing budget of a project. From these accounts, you are silently asking them to spread the word, create community. 

As for farming, I can explain it like this. The metrics of networks and projects are maximized. This way, projects can say there are this many active users in investment rounds. In return, the network receives investment. And shares it with all users. 

All KYC applications like gitcoinpass or etc are not there for farmers to get less airdrops, but for investors to put their money in safer projects. The other effect is just a bonus.