Pieter Hintjens who started ZeroMQ, advocated for 'optimistic merging' as a strategy to encourage community & project building [1] (prev discussed in [2]). For all of the benefits listed it does open it up to lower quality or malicious merges.

[1] http://hintjens.com/blog:106 [2] https://news.ycombinator.com/item?id=39880972