Rss is pretty light. Even if you say it's too much to be re-sending, you could remove the content from the rss feed (so they need to click through to read it),

Rss is pretty light. Even if you say it's too much to be re-sending, you could remove the content from the rss feed (so they need to click through to read it), which would shrink the feed size massively. Alternatively, remove old posts. Or do both. Hopefully you don't have some expensive code generating the feed on the fly, so processing overhead is negligible. But if it's not, cache the result and reset the cache every time you post. Surely this is easier than spending the effort and emotional bandwidth to care about this issue? I might be wrong here, but this feels more emotionally driven ("someone is wrong on the internet") than practical.