Seems like an excuse not to provide a reasonable or trustworthy source

Agreed. This is a meme that only shills could love. A convoluted bullshit excuse to not provide any sort of verification for the content of their bullshit posts.

Asking for any sort of proof or verification of content provided by anonymous internet accounts is so very inconvenient for the lying shills.

No worries. It is good practice for people to understand that shills of all types are lying to them every day. People must learn how to protect themselves, and also to find the small amounts of truth buried in all the lies.

Discernment. Good judgement. Nobody can do this for them. Everyone must learn these things for themselves. Practice helps. In that sense, the many shills here on GAW are providing a public service of sorts.